SEATTLE (AP) — Four U.S. Army soldiers who were part of an elite team that does nighttime missions died when the MH-60 Black Hawk helicopter they were aboard crashed earlier this week near a military base in Washington state, Army officials said Friday.

The helicopter was on a routine training mission west of Joint Base Lewis-McChord when it crashed at about 9 p.m. Wednesday, the U.S. Army Special Operations Command said. The soldiers were part of the 160th Special Operations Aviation Regiment, Airborne, officials said.