The US military on Saturday identified the three soldiers,

He was killed when two helicopters collided in Alaska while returning from a training mission.

The helicopters were on their way to Fort Wainwright from a mission at the Donnelly Training Area,

When they crashed at 1:39 p.m. Thursday,

About 50 miles (80 km) east of Healy.

The US military announced on Friday that it had responded to helicopter crashes in Alaska and Kentucky.

Aviation units have been grounded for training after 12 soldiers died within the past month.

The army said in a statement, "Except for those participating in critical missions,

until they have completed the necessary training,