Two U.S. Army Black Hawk helicopters crashed during a routine training mission in Kentucky, according to a military spokesperson, with the incident resulting in several casualties.

At around 10 p.m. on Wednesday, two 101st Airborne Division helicopters crashed in Trigg County, Kentucky, while on a routine training mission, according to the Fort Campbell Public Affairs Office.

“We can confirm two aircraft from the 101st were involved in an accident last night resulting in several casualties,” the 101st Airborne Division account on Twitter stated.

The crew members were flying two HH-60 Black Hawk helicopters when the crash took place, with the Fort Campbell Public Affairs Office saying that the status of the service members involved in the incident remained unclear.

“Right now our focus is on the Soldiers and their families who were involved,” the 101st Airborne Division stated.

Kentucky Gov. Andy Beshear said in a post on Twitter that local officials were responding to the crash and that “fatalities are expected.”

“Please pray for all those affected,” he added.

The HH-60 is a variant of the Black Hawk helicopter that is designed to provide support for a range of military operations, including medical evacuations and air assault.

The crash took place around 25 miles northwest of Fort Campbell, which is a military base situated on the border between Kentucky and Tennessee.

The 101st Airborne Division is the only air assault division in the U.S. Army and it has in the past been sent to various conflict zones around the world.

The Fort Campbell Public Affairs Office said that more information about the incident would be released as it becomes available.

This is a developing story.