All 20 personnel aboard a Turkish military C-130 cargo plane were killed when it crashed in Georgia’s Sighnaghi municipality near the Azerbaijani border on Tuesday.

The plane, flying from Ganja, Azerbaijan to Turkey, had transported troops who had attended Azerbaijan’s Victory Day celebrations marking the 2020 Karabakh conflict.

Turkish and Georgian authorities are investigating the crash, with the flight data recorder recovered and wreckage spread across farmland and hills.

Turkey’s Defense Minister and President Erdogan confirmed the deaths, while leaders from Azerbaijan, Georgia, the U.S., and NATO expressed condolences, the AP has reported.

The aircraft, built in 1968 and acquired by Turkey in 2010, was part of the 12th Air Base Command in Kayseri and had no distress signal before losing contact.