A helicopter crash at Fort Campbell in Kentucky left several people dead, according to the state’s Governor Andy Beshear, who announced the incident on Twitter early on Thursday.

“We’ve got some tough news out of Fort Campbell, with early reports of a helicopter crash and fatalities are expected,” Beshear, a Democratic who’s been in office since 2019, wrote on Twitter, adding that Kentucky state police, the state’s Division of Emergency Management and local officials were responding on the scene.

“We will share more information as available. Please pray for all those affected,” he concluded.

It’s not yet clear exactly how many casualties there were from the crash, which happened during a training mission over Kentucky on Wednesday night when two U.S. Army helicopters collided, according to a statement by Army spokesperson Nondice L. Thurman early on Thursday.

The aircraft involved were HH60 Black Hawk assault helicopters, according to a Fort Campbell employer mentioned by The New York Times, which crashed against each other at about 10 p.m. on Wednesday during a training mission in Trigg County.

The same source told the newspaper that the helicopters belonged to the 101st Airborne Division, the Army’s only air assault division.

Members of the U.S. Army 2nd Brigade Combat Team depart for their deployment in Europe on July 7, 2022 in Fort Campbell, Kentucky.
Brett Carlsen/Getty Images

Newsweek has emailed Beshear’s team and Fort Campbell’s media team for comment.

This is a breaking news story and will be later updated.