An investigation into the deaths of 19 firefighters in Arizona has found that inadequate communication played a role in their fate.
Members of the Granite Mountain Hotshots were killed as they battled a wildfire near the town of Yarnell on 30 June.
The BBC reports investigators found no evidence of negligence or reckless behaviour.
The report found that "brief, informal, and vague radio transmissions" meant that few people in the operation as a whole understood the team's intentions, movements and location once they went down into a valley where there was thick vegetation.
The men were deploying fire shelters when the fire overtook them.