An investigation into a Vancouver Island train derailment that killed three people and left two others seriously injured won’t result in criminal charges.

Mounties announced Monday the investigation is being turned over to the Transportation Safety Board and WorkSafe BC.

The decision to turn over the investigation means RCMP did not find evidence of an intentional criminal act or criminal negligence in the fatal derailment.

It happened just before 9 a.m. Thursday when a train carrying Western Forest Products personnel and material derailed, killing three people and critically injuring two.

A safety director for the United Steelworkers union said one of the injured people has undergone multiple surgeries for crushed legs and remains in hospital, while the other is at home recovering from unspecified injuries.

Both workers will be okay, the union said.

TSB investigators were on scene at the site of the crash over the weekend, examining conditions of the track, interviewing witnesses as well as company officials.

Once all the data is collected, the board will determine whether it will conduct a full investigation.

WorkSafe BC says its own investigation into the derailment will likely take months until a final report is produced.