A report into the explosion at a Glasgow plastics factory in which nine people were killed has been handed to the Crown Office.
Nine people were killed in the factory blast
The announcement comes a day before the first anniversary of the blast at Stockline Plastics.
The report was carried out by police and the Health and Safety Executive. It is said to be "substantial" and includes "complex technical analysis".
Crown counsel said the report will take "some time" to consider.
A detailed site investigation covering the whole of the 2,000 sq m site lasted from May to December.
More than 5,500 tons of debris was taken from the site of the factory and sifted by hand by a specialist investigation team.
About 1,000 bags of company paperwork, each weighing one ton, were removed from the rubble and examined carefully.
Police also carried out more than 1,000 witness interviews.
Based on the technical report an animated reconstruction of the sequence of events at the factory has now been commissioned.
After considering the report, the Crown Office may decide to prosecute the company or its director.
If there is no evidence of wrong-doing they will call a Fatal Accident Inquiry.
GLASGOW BLAST VICTIMS
Margaret Brownlie, 49, Strathaven
Annette Doyle, 34, Glasgow
Peter Ferguson, 52, Kilbarchan
Thomas McAulay, 41, Mount Florida, Glasgow
Stewart McColl, 60, West Kilbride
Tracey McErlane, 27, Possilpark, Glasgow
Kenneth Murray, 45, Paisley
Timothy Smith, 31, Johnstone
Ann Trench, 34, Colston, Glasgow
On Wednesday, the first anniversary of the blast will be marked with memorial services to the victims.
Family and friends of the dead will join survivors of the explosion to remember Scotland's worst industrial disaster since Piper Alpha.
A mass will be held at St Columba's RC Church, yards from the blast site, at 1000 BST one year to the hour after the tragedy.
Local dean Canon Robert Hill will preside over the service at which a candle will be lit for each of the nine people killed in the explosion.
And there will be an evening memorial service at the Maryhill Community Centre, where anxious relatives gathered to await news of their loved ones last year.
ICL/Stockline spokeswoman Joanne Downie said: "The first anniversary of the tragedy is a deeply sad occasion as we feel the loss and grieve so deeply for so many dear friends and colleagues.
"The Maryhill Community Centre, whose staff were so involved on that terrible day, is where we can come together to remember those we have lost and give thanks for their lives."