A military helicopter crash investigation is underway in the state of Washington following a downed aircraft Wednesday night, officials confirmed to Fox News.The crash happened in the Summit Lake area near Joint Base Lewis-McChord (JBLM) on Wednesday night, the Thurston County Sheriff's Office said on Facebook. "We have been advised that the military lost contact with a helicopter in the area, and we are working closely with JBLM to deploy any resources needed to assist," the post said.A spokesperson for the base said that the incident happened around 9 p.m. local time "in a rural area near the installation."ARMY HELICOPTER THAT CRASHED WITH COMMERCIAL PLANE IN DC WAS FLYING ABOVE ALTITUDE LIMIT: NTSB"This remains a developing situation, and no additional details are available at this time," a statement said.This is a developing story. Check back here for updates.