A fire at Canadian Forces Base Wainwright near Wainwright, Alberta on Saturday kills four Canadian Armed Forces personnel and injures dozens of others. Reports say the blaze spread unusually fast as it moved through a training area during scheduled exercises, with strong or exceptionally strong winds cited by officials. Prime Minister Mark Carney calls it one of the worst peacetime tragedies for Canada’s military.

Accounts across outlets describe the event as occurring while soldiers conduct live-fire combat training, including hand-grenade range activities and section-attack exercises. Some reporting notes the fire shifted direction toward an administrative area and that the spread occurred within seconds to about a minute. While one outlet links the fire to a grass-fire scenario, investigators have not publicly confirmed the exact cause.

Investigations are underway. One report says 50 investigators are deployed to examine the incident, while others describe the incident being probed as a military investigation. A number of casualties are treated at hospitals in Edmonton as local facilities respond. Public statements from base leadership and the federal government address protection of critical infrastructure and support for those affected.