The U.S. Army is confirming the deaths of four special operations soldiers aboard a U.S. Army MH-60 Black Hawk helicopter that crashed near Joint Base Lewis-McChord in Washington state. The helicopter was on a routine training mission west of the base when it crashed at about 9 p.m. Wednesday. Officials said the soldiers were part of the 160th Special Operations Aviation Regiment, Airborne. The regiment’s mission is to organize, equip and employ Army special operations aviation forces around the world, according to the Army’s website. The cause of the crash was under investigation, officials said. The crash sparked a small wildfire.