Knifeman arrested by armed police in central London
A man armed with a knife has been arrested by armed police in central London.
The man, aged in his 20s, was thought to have tampered with the fire alarms and barricaded himself in a room at the hospital accommodation block on Foley Street.
It is understood he later made his way to the roof before falling through a skylight.
One of the residents told the BBC the man had threatened him with a knife.
Met Police said the man, who was taken to hospital but not thought to be seriously injured, was arrested on suspicion of affray, criminal damage and burglary.
John Astor House on Foley Street is used to accommodate staff for University College London Hospital.
Residents, some of whom were dressed in night clothes, gathered outside in the street after a fire alarm was set off.
One of the residents said a man had threatened him with a knife in one of the corridors, and had told him to leave the building.
Police cordoned off the street and a man was escorted from the premises to a waiting police van.
After the man was driven away police reopened Foley Street but dozens of residents remained on the pavement as a number of police officers remained inside the hostel.