That is all for today's Scotland Live blog. You can check out all thelatest developments on the story of missing student Karen Buckley on our website throughout the evening.
Police Scotland says it is following a definite line of inquiry in the investigation into the disappearance of student Karen Buckley, who went missing in Glasgow in the early hours of Sunday morning.
BBC Scotland understands that a 21-year-old man has been detained in connection with her disappearance.
Police investigating the disappearance of Karen Buckley have said they are following a "definite line of inquiry".
A police underwater unit van has arrived at the entrance to Dawsholm Park, reports BBC Scotland's Scott Holdaway.
Police have also cordoned off High Craigton Farm near Milngavie.
Karen Buckley, 24, from Cork, was seen leaving the Sanctuary nightclub with a man in the early hours of Sunday.Read all the latest on the search for the missing student.
Moray Council has awarded a £17m contract for the refurbishment of four primary schools.
The schools which will be upgraded are Applegrove in Forres, Millbank in Buckie, Seafield in Elgin and St Gerardine in Lossiemouth.
Refurbishment will include new roof coverings, windows and doors, new toilets and modernised heating and electrical systems.
Work will begin in the summer break, with completion slated for spring 2017.
Hearts defender Adam Eckersley has accepted the offer of a two match ban from the SFA's compliance officer.
Eckersley was cited for headbutting Hibernian's Scott Allan in Sunday's Edinburgh derby, an incident which was missed by the match officials.
The Chief Executive of Hibs Leeann Dempster has made a statement after it emerged Hearts will take on Rangers a day after the rest of the final round of fixtures in the Scottish Championship.
The Hearts vs Rangers match was originally due to take place at 15:00 on Saturday, 2 May - the same time Hibs and the other Championship clubs are in action.
However, the game at Tynecastle has been moved to 12:30 the following day for live coverage on Sky Sports.
Ms Dempster said: "In previous seasons, the league has ensured that all of the final round fixtures are played at the same time.
"I have been in contact with the SPFL following its announcement that one final round fixture would kick off after all the other results are known.
"I have reminded them in very clear terms that - as the organiser of the competition - the responsibility for protecting its unimpeachable sporting integrity lies with them."
Graeme Dott is through to the main draw of the Snooker World Championships after beating China's Yu Delu 10-7 in the qualifying stages.
"I don't care who I play," said Dott, from Larkhall.
"Ronnie O'Sullivan in the first game, why not? I've played three games and he's not played any.
"I don't think anyone is going to want to draw me. I'm not saying they will be intimidated but there will certainly be easier games than me."
Police divers have joined the search for an Irish student who went missing following a night out in Glasgow.
Karen Buckley, 24, from Cork, was seen leaving the Sanctuary nightclub with a man in the early hours of Sunday.
BBC Scotland understands he is 21-year-old Alexander Pacteau, who has been interviewed by police but is not being treated as a suspect.
Miss Buckley's bag was found in Dawsholm Park, close to Mr Pacteau's home, on Tuesday afternoon.
Bosses have met with unions in a bid to prevent further strikes at Scotland's regional airports.
A joint statement from Highlands and Islands Airports (Hial) and the Prospect union said both parties were "hopeful of finding a solution".
Security staff staged a 48-hour walkout earlier this month as part of an ongoing dispute over pay.
Hial operates 11 Scottish airports in Dundee, Inverness, Argyll, the Hebrides, Orkney and Shetland and Wick.
BBC Scotland news
A defence contractor has been fined £24,000 after two sub-contractors suffered horrific injuries in an accident at a plant in Fife.
Kirkcaldy Sheriff Court heard that it was not reasonable for Raytheon Systems, which builds laser guidance systems for missiles, to ask the men to carry out the non-essential work while the factory's electrical system was live.
Workers Steven Delargey and Russell Brand - both employees of Fife firm C&F Electrical Services - tried to replace capacitors while a high voltage electrical system was live at Raytheon's Glenrothes factory, because the defence firm didn't want production interrupted.
The pair suffered horrific face, neck and arm injuries in the accident and both had to be admitted to hospital intensive care units for four days.
A Health and Safety Executive investigation found that the work should not have gone ahead with the distribution board live.
C&F Electrical Services were also fined £20,000.
A woman has appeared in court charged with fraud following the deaths of a mother and daughter at a hotel in Greenock.
Twenty-three-old Nicola McDonough, and her mother Margaret (both pictured), died after being found injured at the Premier Inn in May, 2013.
Linsey Cotton appeared at Paisley Sheriff Court accused of trying to extort money from several members of the McDonough family.
The 32-year-old is also alleged to have told them the McDonoughs would end up in prison if they didn't give her several thousand pounds.
Ms Cotton denies all the charges, and the trial will continue in August.
Celtic striker Leigh Griffiths has pleaded not guilty to accusations that he took part in racist chanting at a pub in Edinburgh last year.
The 24 year old is alleged to have sung an offensive song while in a pub in Roseburn Terrace ahead of the Hearts - Hibs derby last March.
He is charged under the Offensive Behaviour at Football and Threatening Communications Act.
The footballer made his plea to Edinburgh Sheriff Court by letter, and the case was continued until September.
St Mirren say they have terminated the contract of defender Marc McAusland by mutual consent.
The Paisley side are bottom of the Scottish Premiership and 10 points adrift of Motherwell with five games remaining.
Manager Gary Teale hinted after Monday's 3-0 defeat by Ross County that he might make changes to his side.
The 26-year-old McAusland, who was in his second spell at the club, played 43 minutes of that game before going off injured.
BBC Radio Scotland
A man has been warned he could face jail after admitting endangering an aircraft whilst drunk - then setting off a fire alarm at Aberdeen airport.
Graham Leonard from Newmachar in Aberdeenshire had drunk beer and gin during a day trip to watch Manchester United.
During the private charter flight, he used the public address system to perform karaoke and threw a hot towel at a cabin crew member.
Calling for background reports, Sheriff Edward Savage delayed sentencing the 46-year-old until next month.
BBC Scotland Travel
In Glasgow, the Broomielaw is now fully open again between Jamaica Street and Oswald Street following an accident.
The road was closed for a few hours so traffic in and around the area is still heavier than usual.
The detective leading the search for Karen Buckley has said it is his "absolute priority" to find her.
Detective Superintendent Jim Kerr earlier said police are "gravely concerned" for Ms Buckley, 24, who has not been seen for three days.
Police divers, a helicopter crew and search dogs are all now involved in the search in the north-west of the city around Dawsholm Park where her handbag was found.
Mr Kerr said: "Our absolute priority is to find Karen Buckley. We have a team of specialist search officers from the west and east working in the area as well as additional patrols in the west end and north of the city.
"Anyone with any information, no matter how insignificant it may seem, should contact 101 or anonymously on Crimestoppers."
BBC Radio Scotland
Over the course of several months, BBC Scotland reporter Sam Poling secretly filmed dog trafficker Brian Mr O'Neill obtaining puppies from the Republic of Ireland and illegally trafficking them into Northern Ireland, and then into Scotland through Belfast Ferry Port.
The pups Mr O'Neill was bringing into the UK should have pet passports, microchips and a rabies vaccination. They have none of these, breaching legislation set up to protect young dogs and to defend the UK from rabies.
Sam caught up with Mr O'Neill on one of his buying trips in Ireland.Watch what happened.
Political editor, Scotland
For reasons I find somewhatdifficult to explain, I have never been a huge fan of the movie, "The Wizard of Oz".
I mean, it's not as though I entirely revile fantasy narratives. When younger, I roamed happily through Gormenghast and Middle Earth.
And yet the tale of Dorothy tends to leave me cold or puzzled or both. Not so, it seems, Nick Clegg - he who would be kingmaker-in-chief for the next Westminster Parliament.
Clearly delving into Oz imagery, Mr Clegg said that he would provide the Tories with a heart and Labour with a brain. Which, of course, only leaves courage. Who, one wonders, will supply that to our tribunes?
Political correspondent, BBC Scotland
The Scottish Liberal Democrat leader, Willie Rennie, has said his party wants to extend free childcare to all two-year-olds in Scotland by 2020.
Although this is a Holyrood responsibility, he said Liberal Democrats in government at Westminster would ensure the resources were available to make the extra provision possible.
Mr Rennie was speaking on a campaign visit to a nursery in Edinburgh on the day his UK party colleagues published the Liberal Democrat manifesto.
Conservative plans to bar Scottish MPs from voting on income tax rates south of the border are "right and fair", George Osborne has insisted.
Campaigning in Aberdeenshire, the chancellor said the manifesto pledge - which comes following plans to give greater control over income tax to the Scottish Parliament - would create a "stronger Scotland within a stronger UK".
He added: "If you have a Scottish rate of income tax, a consequence of that is you have an English rate of income tax and I think it's only right and fair that English MPs would then have a decisive say over that."
Business and economy editor, Scotland
Output from theScottish economy rose by 0.6% during the final three months of last year, according to Scottish government figures released today.
The UK as a whole saw the same rate of growth.
Construction was up a strong 6%, with production up slightly and the dominant service sector flat.
Output rose by 2.8% between the end of 2013 and the end of 2014, while in the UK, it was up 3%.
What's popular and why
The former Chief Executive of Aberdeen City Council has said she warned councillors on two occasions about the "potentially contentious" nature of a letter distributed with council tax bills during the referendum.
Valerie Watt has been giving evidence at a hearing of the Standards Commission in Aberdeen.
The letters said Aberdeen would be stronger now and in the future as part of the UK.
Five Labour and two Conservative councillors face claims they breached the code of conduct.
A doctors practice in Aberdeen is to be dissolved in part due to ongoing recruitment issues.
The Brimmond Medical Group, which has more than 8000 patients, will cease operating at the end of September.
It says it can no longer offer primary care NHS services due to a shortage of GPs.
It comes as theBritish Medical Association warns of a looming crisis in the profession. The Scottish government says investment in primary care has seen the number of GPs increase by nearly 7%.
Queen of the South's plans for the 2015-16 seasonare taking shape after three key players signed new deals.
Captain Chris Higgins (pictured), along with forwards Derek Lyle and Iain Russell, have extended their contracts until the summer of 2016.
Manager James Fowler said: "They have played a big part in the success so far this campaign and deserve the reward.
"Discussions with other players continue and I hope to get a few more tied up in the coming weeks."
Hibs, Hearts and Motherwell have put forward a proposal to cut the amount of cash distributed to clubs who are not part of the play-offs.
The current rules state that clubs out with the play-offs get a share of 50% of money generated through gate receipts.
All 42 SPFL clubs will now vote next week on a proposal to cut that percentage to 25%.
It is understood the difference in cash distributed could be as much as £500,000.
The rules governing the play-offs were agreed by clubs, including Hibs, Hearts and Motherwell, when the SPL and the SFL merged to form the SPFL two years ago.
A drunk driver fell 100ft (30m) off a road bridge after crashing his car.
Leonard Shaw denied drink driving,telling his trial in Perth that he had fallen off the Friarton Bridge in April 2014 after stubbing his toe.
The 63-year-old said it was only then that he drank a bottle of whisky, before climbing back up to the road where police were searching for him.
Sheriff Simon Collins rejected Shaw's claims, finding him guilty and banning him from driving for three years.
Low-cost airline Wizz Air is tostart flying from Glasgow to Vilnius.
It will be the first time the Lithuanian capital has been served from Glasgow airport, with the service due to operate year round, twice weekly, starting on 16 September.
The new route brings the European airline's destinations from Glasgow airport to seven.
Ataxi driver had his nose broken after being hit in the face with a bottle by one of his passengers in Edinburgh.
He was attacked at 23:00 on Sunday 5 April after picking up a fare from the city centre and then dropping off two men and a woman at Niddrie House Avenue.
Police have appealed for anyone who has information to come forward.
PC Victoria Henretty said: "This was a completely unprovoked and violent assault on a taxi driver".
The chief executive of British Swimming has said Michael Jamieson has to train "more and harder", but is a "determined young man" and can still qualify for next year's Olympics in Rio.
However, David Sparkes admits that it will now be an "incredible feat" for Jamieson to make Team GB due to the amount of talented British breaststrokers currently on the scene.
Jamieson - who won silver in the 200 metres breastroke at the London Olympics in 2012 - finished sixth over the same distance at last night's British championships.
Former Annan Athletic players are joining a challenge to visit all of Scotland's42 senior football club grounds in just 42 hours.
The event aims to raise awareness of the JMA Trust, which was set up in memory of their friend John Maurice Aitken, who died from non-Hodgkin's lymphoma aged 32.
Joe Cranston, Gary McMenamin and Mr Aitken's brothers Kevin and Ciaran will leave with organiser Gordon Moffat from Stranraer on Thursday morning.
They will finish in Annan on Friday.
An investigation has been launched after the body of a man was found in flats in Fife.
Police officers found the body after being called to Tummel Road, Glenrothes, at 12:00 on Monday.
Police Scotland said they were treating the man's death as unexplained.