Three members of the same family were among six people killed when a bin lorry lost control, hitting Christmas shoppers in Glasgow city centre yesterday.
Erin McQuade, 18, and her grandparents Jack Sweeney, 68, and his wife Lorraine, 69, all from Dumbarton, were killed in the incident.
Primary school teacher Stephenie Tait, 29, from Glasgow, Jacqueline Morton, 51, from Glasgow, and Gillian Ewing, 52, from Edinburgh also died in George Square.
Scottish First Minister Nicola Sturgeon said afterwards that the city had been left with a "broken heart" after the crash, while the congregation at a special prayer service was told that Glasgow was now "united in grief".
Ten people were also injured in the accident yesterday. Six of them, including the driver of the bin lorry, are still being treated in Glasgow hospitals.
George Square had been sealed off with steel cordons as Police Scotland investigated the crash.
When those were lifted today, members of the public who had been touched by the incident went to the scene to leave tributes to the victims, whose bodies were removed by a fleet of private ambulances earlier.
Lorry driver may have fallen ill prior to crash
It is thought the driver may have fallen ill at the wheel as he travelled up Queen Street, causing the bin lorry to strike a pedestrian outside the Gallery of Modern Art.
The truck continued, hitting several other people and coming to a halt only when it crashed in to the side of Millennium Hotel in George Square.
Chief Superintendent Andy Bates said: "This is a tragic incident which occurred in the heart of Glasgow city centre at a time when people were preparing for the festive season.
Mr Sweeney was a former president of Bramalea Celtic supporters club in Canada, with the club putting a statement on its Facebook page expressing "great shock and sadness" over the deaths.
Miss McQuade was a student at Glasgow University and also worked at the luxury Cameron House Hotel on the banks of Loch Lomond, where she was described as "one of our brightest and dedicated members of housekeeping staff".
Ms Tait was a primary school teacher at St Philomena's Primary in Glasgow, where head teacher Catherine Gallagher said the "entire school community is deeply saddened by this tragic news".
Ms Tait had studied at Glasgow University, whose Principal and Vice Chancellor Professor Anton Muscatelli said it was "deeply saddened" to learn of the death of one of its current students and a graduate.
Special prayer service held for victims
At a prayer service held this morning at the nearby St George's Tron Parish Church the Rev Stuart Smith, moderator of Glasgow Presbytery of the Church of Scotland, said the circumstances of the crash were "more sudden and shocking than we could have imagined possible if it wasn't for the evidence right here in front of us".
He said: "In just a few minutes yesterday afternoon, a scene of celebration and festive lights in George Square turned to devastation and despair."
A book of condolence has been opened at the St George's Tron Parish Church in Glasgow.
Yesterday's tragedy struck just over 12 months after the Clutha Bar helicopter crash in Glasgow, which claimed the lives of 10 people when a police helicopter crashed on to the roof of a crowded pub last November.
Ms Sturgeon said while 2014 had been an incredible year for the city, which hosted the Commonwealth Games in the summer, it had been "bookended by two unimaginable tragedies".
She described Glasgow as a "city with a broken heart" but added: "This city will pull together to support those who have been affected, not just in the days ahead but in the weeks and months to come."
The Rev Alastair Duncan, who took today's prayer service, said afterwards: "There were tears and there were people who were just feeling the sense of loss and suffering that other people are going through.
"It's difficult. It is close to Christmas and Christmas will go on for people, they will celebrate with their families. But I imagine that will be tempered by the knowledge that for some families not just this Christmas but many Christmases to come will never be the same again."
