A fire at a Canadian military base in Alberta last week kills four soldiers and injures dozens of others. Canadian defence officials say the blaze started during training involving live grenades.

Outlets report that the incident began on a grenade launcher range while service members carried out exercises, and then spread quickly. CBS News and ABC Australia both describe the cause as a live grenade exercise. The Washington Examiner adds that the fire spread with the help of strong winds and provides a fuller injury count, saying 39 people were hurt.

Across coverage, the common thread is the same: officials link the deadly fire to live grenade training at the base, but details on how the fire spread and the exact injury figures vary by outlet.