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  1. Second man arrested in connection with Parsons Green attack
  2. The 21-year-old was detained in Hounslow, west London on Saturday night
  3. On Saturday morning, Kent Police arrested an 18-year-old man in Dover
  4. UK terror threat level reduced from 'critical' to 'severe'
  5. Police 'keeping an open mind' on number of suspects involved
  6. Of the 30 people injured, one is still being treated in hospital

Live Reporting

By Owen Amos and Dearbail Jordan

All times stated are UK

What we've learned today

  • The terror threat level has been reduced from "critical" to "severe"
  • A second suspect was arrested in Hounslow, west London on Saturday at 11.50pm
  • Police are searching a home in nearby Stanwell, Surrey in connection with that arrest
  • A search is also taking place at a property in Sunbury-on-Thames where it is believed an 18-year old suspect lives. He was arrested in Dover on Saturday morning
  • Of the 30 people injured, one is still being treated in hospital

Watch: Terror threat reduced

The scene in Stanwell, Surrey

A property is being searched in Stanwell in connection with the arrest of a 21-year-old man in nearby Hounslow yesterday.

A house in Stanwell, Surrey

Public must remain vigilant, says London Mayor

Investigators 'getting greater understanding' of bomb

Explosive device on a District Line Tube tain

Assistant commissioner Mark Rowley says that investigators "are getting a greater understanding of the preparation of the device" used in Friday's attack.

Two house searches are continuing - both in Surrey - following the arrests of an 18-year old man in Kent and a 21-year old male in Hounslow on Saturday.

Mr Rowley said: "The high pace and rapid progress of this investigation is continuing."

Threat level still at severe, say police

Assistant commissioner Mark Rowley says that although the threat level to the UK from international terrorism has been reduced from critical "there is still a severe threat level".

He said: "If you see something you are worried about or know somebody you are worried about don't hesitate, just ACT. Please call us on the Anti-Terrorism Hotline 0800 789 321 or report online by visiting

Increased police presence will continue

Assistant commissioner Mark Rowley, national lead for counter terrorism policing, has given an update on the downgrade in the UK terrorist threat level.

Members of the public will be wondering what that means in terms of their travel into work tomorrow. For practical and precautionary reasons we made the decision that the increased resources will continue for the beginning of this week. So the public will still see that high level of policing presence; some armed, some unarmed.

The military support we have had in place under Operation Temperer will start to phase out as we move through the coming week. There are detailed and well-rehearsed plans in place to ensure a smooth transition from Operation Temperer, and military personnel will remain at readiness to deploy in support of the police should future security situations require.

I want to stress however, that specialist teams, well-rehearsed at dealing with major incidents, continue to provide a strong visible presence throughout the capital and across the UK."

Police keeping 'an open mind'

Investigators search a house in Sunbury-on-Thames

Neil Basu, the Metropolitan Police's senior national co-ordinator for counter terrorism, says that investigators are keeping an open mind over the number of people involved in Friday's incident.

He says: "At this stage we are keeping an open mind around whether more than one person is responsible for the attack and we are still pursuing numerous lines of enquiry and at a great pace.

"The Metropolitan Police and its partners across the Counter Terrorism Policing Network have been working around the clock and through the night to identify, locate and arrest those responsible for this cowardly crime."

Police making 'good progress'

Police on street
Getty Images

Home Secretary Amber Rudd says that the police have made "good progress" on their investigation into the bombing on a Tube train on Friday.

Military to return to original positions

Home Secretary Amber Rudd says that over the next few days the military will return to their original positions.

Military personnel have been supporting the police following the Parsons Green bombing on Friday.

Ms Rudd made the announcement as the UK terrorist threat level was reduced from critical to severe.

She says: "The Joint Terrorist Analysis Centre which reviews the threat level that the UK is under have decided to lower than level from critical to severe."

She says that severe still means that an attack is highly likely "so I would urge everyone to be vigilant but not alarmed".

Search in Stanwell

Scotland Yard has confirmed that a search is taking place at a residential address in Stanwell, Surrey, in connection with the arrest of a 21-year-old man in nearby Hounslow yesterday.

What the terror threat levels mean

From the MI5 website:

  • LOW means an attack is unlikely
  • MODERATE means an attack is possible, but not likely
  • SUBSTANTIAL means an attack is a strong possibility
  • SEVERE means an attack is highly likely
  • CRITICAL means an attack is expected imminently

BreakingTerror threat reduced to 'severe'

The terror threat level is being reduced from "critical" to "severe", Home Secretary Amber Rudd announces.

Sunbury search 'may last several days'

Forensic teams have placed tents at the front and back of the property
Forensic teams have placed tents at the front and back of the property

Our correspondent Kathryn Stanczyszyn is in Sunbury-on-Thames, where investigators are still searching a house where it's thought a Parsons Green suspect lives.

She says one resident was told by police that activity at the house could last several days.

There is a semi-permanent cordon taking in the property that is being searched as well as seven houses on each side.

Our correspondent says residents are distressed by what has happened, but are happy they have been allowed back into their homes.

Update from Surrey Police

Why is the terror threat level 'critical'?

Raffaello Pantucci, director of international security studies at the Royal United Services Institute, told BBC News: "That they have left it at critical is possibly a reflection of the fact that they have not got total clarity on what exactly has taken place. If they think they have disrupted the bomb-maker they may be looking at other people out there. And if you look back at recent history, there are often copy-cats - people who use an attack as a springboard to launch something they have been thinking about for some time."

Section 41 explained

From the Press Association...

Both suspects arrested in connection with the Parsons Green attack are being held under section 41 of the Terrorism Act 2000.

This law gives police the power to arrest someone suspected of terror-related offences without a warrant.

It also allows police to detain suspects without charge beyond the four days allowed for suspects connected to other crimes.

The maximum period of pre-charge detention has varied but currently stands at a maximum of 14 days.

Detention must be reviewed at 12-hour intervals during the first 48 hours.

After that, warrants for further detention must be obtained from a court.

Following the 7/7 bombings in 2005, the government attempted to get the maximum period of detention without charge extended to 90 days, but the proposal was defeated in the House of Commons.

Police search Hounslow property

Forensic teams are searching a property in Hounslow, west London, following the arrest of a second man in connection with the Parsons Green bombing on Friday.

Police have put a cordon up around an area containing the house. People have been told to stay in their homes.

Amber Rudd on 'new' money for counter-terrorism

Police appeal to public

Police have again appealed for anyone with footage and images from the attack to pass them to investigators.

They can be uploaded at

Anyone with information is urged to call the Anti-Terrorist Hotline on 0800 789 321.

Government seeks counter extremism commissioner

Home Secretary Amber Rudd says the government will this week advertise for the newly-created role of lead commissioner for countering extremism.

The job will have a remit to "identify extremism and advise the government on new policies, laws and other actions that may be required to tackle it".

Schoolboy caught in Tube bomb stampede

A 13-year-old schoolboy has described being trampled in a stampede as passengers fled from the attack on Friday.

Alex Ojeda-Sierra told the Mail on Sunday: "One man fell on me and my legs bent backwards and my right ankle got twisted. I started screaming that I had no air."

Alex was treated at Chelsea and Westminster hospital and is now at home recovering.

Police erect tent in house search

Police activity 'very extensive'

Our home affairs correspondent Dominic Casciani is at the scene in Sunbury-on-Thames:

Residents living close to the property at the centre of the Parsons Green investigation say the search currently underway appears to be very extensive. A police forensics tent is now in place in the back garden of the property belonging to Ronald and Penelope Jones and large numbers of officers have been working inside. Police dogs at the scene appear to be one of the breeds trained to search for explosives and chemicals. Some residents have been told by officers that the outer cordon which is limiting access to a number of neighbouring roads will be lifted by early afternoon but that the inner cordon surrounding the Cavendish Road property will remain for some time. There has been no formal confirmation from the Metropolitan Police."

One bomb victim remains in hospital

Ambulance at Parsons Green
Getty Images

NHS England says that one person remains in hospital following Friday's attack.

In total, 30 people were received by hospitals, 19 of whom were taken by ambulance.

The remaining patient is at Chelsea and Westminster hospital, where the majority of victims were treated.

What we've learned today

  • Police have arrested a second man in connection with Friday's terror attack at Parsons Green
  • The 21-year old was arrested in Hounslow, west London, at around 11.50pm on Saturday
  • He is being held at a south London police station
  • Home Secretary Amber Rudd says the second arrest suggests it was not a "lone wolf attack" - but it is too early to reach "final conclusions"

An aerial view of the police search

Police have put up barriers on a street in Sunbury-on-Thames.

They are searching what's believed to be the home of the 18-year-old suspect arrested on Saturday morning.

Barriers on Cavendish Road, Sunbury-on-Thames.

Abbott 'concerned' about police resources

Shadow Home Secretary Diane Abbott earlier told the BBC of her concerns about police resources amid a rise in terrorist attacks.

She said: "It is the fifth attack and it is concerning. There are issues about resources and the sustainability of person power when it comes to responding to these attacks."

Ms Abbott also urged the public to remain calm when they return to work and school on Monday.

"The point is people should be alert but they should not be alarmed because that's what the terrorists want to do, they want to scare and disrupt our society."

Police barriers in Sunbury-on-Thames

Police are searching a house in Sunbury-on-Thames - believed to be the home of the 18-year-old-suspect arrested in Dover on Saturday.

Barriers have been put up around the house.

Barriers in Sunbury on Thames

Suspect's house search 'ramping up'

Our correspondent Kathryn Stanczyszyn is in Sunbury-on-Thames and says that activity is "ramping up".

Police began searching a property in Cavendish Road on Saturday, believed to be the home of a man arrested in Dover on Saturday morning.

She says there has been intense activity overnight, and a perimeter erected in the past hour.

Police can fund pay rises without job cuts

The Andrew Marr Show

Ms Rudd claims the police can make savings to fund a 2% pay rise without cutting jobs.

She says: "They have £1.5bn in reserves and Tom Winsor [Chief Inspector of Constabulary for England and Wales] has been quite clear from his report that there are additional savings police can make."

'Too simple' to blame terror on police cuts

The Andrew Marr Show

Ms Rudd says she accepts there are 23,000 fewer police officers compared to 2010. However, she says that between 2010 and 2015 crime came down.

It is "too simple" to say that as police numbers have fallen terrorist attacks have risen, says Ms Rudd.

"What we have is an onslaught of attack from Daesh trying to radicalise people. We have to work against making sure that foreign fighters don't come back here from Syria," she says.

Second arrest suggests 'not a lone wolf'

Amber Rudd says the second arrest in the Parsons Green investigation suggests the attacker was not "a lone wolf" - but she added it was "too early to reach any final conclusions".

Amber Rudd: Second arrests suggests 'not a lone wolf'

Extra £24m for counter-terrorism

The Andrew Marr Show

Ms Rudd says the government is "absolutely committed to making sure the security services and the police have the right resources".

She says: "Today we have announced £24m of new money which will go to counter-terrorism operations across the country where it's needed, particularly to support operations where they're protecting people in public."

'No evidence' on IS claim

The Andrew Marr Show

So-called Islamic State has said it was behind the Parsons Green attack.

But Ms Rudd says: "It is inevitable that so-called Islamic State or Daesh will reach in and claim responsibility. We have no evidence to suggest that yet.

"But as this unfolds and as we do our investigations, we will make sure we find out how he was radicalised if we can."

Amber Rudd on Donald Trump

Too early to conclude on 'lone wolf' theory

The Andrew Marr Show

Home Secretary Amber Rudd tells The Andrew Marr Show it is "too early to say" whether the 18-year old arrested on Saturday in Dover was acting as a "lone wolf".

But she says the second arrest "suggests" the attacker was not working alone.

"This has been a year like no other," she says about the five terrorist attacks in 2017 - as well as six attempts foiled by the police.

Armed police out again

The British Transport Police firearms unit has placed extra officers on duty and they will be patrolling stations again on Sunday:

View more on twitter

The latest from Sunbury

Police at Sunbury-on-Thames

Our correspondent Andy Moore is at Sunbury-on-Thames where police are continuing to search a home.

It is thought the 18-year old man arrested in Dover on Saturday morning lives there with his foster parents.

Our correspondent says that overnight, a barrier was erected in front of the property - which "suggests that they intend to be at this house for some time".