Four crew members on a Black Hawk helicopter that crashed in southern Afghanistan Thursday were Hawaii-based, a unit from the 25th Combat Aviation Brigade at Wheeler Army Airfield confirmed a day after the crash.

The brigade “is mourning the loss of four fallen comrades” from Task Force Diamond Head, A Company, the 2nd Battalion, 25th Aviation Regiment who died in the crash in Shah Wali Kot district of Kandahar province, the family readiness group for another Hawaii-based aviation unit, Echo Troop of the 2nd Squadron, 6th Cavalry Regiment, said Friday on its Facebook page.

“The affected families have been properly notified, and our rear detachment, family readiness groups, and care response teams are working to ensure their needs are being met,” the Facebook post said.

Seven Americans, including the helicopter crew, two Navy SEALs and a Navy explosives expert, along with three members of the Afghan national security forces and an Afghan civilian interpreter, were killed when the Black Hawk went down, according to reports out of Afghanistan.