The Transportation Safety Board of Canada will release its report on the deadly Lac-Megantic train derailment later this month.
The TSB says it will hold a news conference in the Quebec town on Aug. 19.
A train carrying crude oil derailed and exploded in Lac-Megantic on July 6, 2013, wiping out dozens of buildings and killing 47 people.
Three employees of the now-insolvent Montreal, Maine and Atlantic Railway, the company at the centre of the disaster, have each been charged with 47 counts of criminal negligence causing death, one for each victim of the crash.
The MMA itself is also facing the same charges.