A helicopter belonging to Saudi Aramco, the state-owned oil company of Saudi Arabia, crashed in the eastern Ras Tanura region on Sunday, killing all 14 people on board. The incident was reported by the Saudi Press Agency and Arab News, citing an official from the Ministry of Energy. According to the ministry’s statement, no one aboard the helicopter survived the crash.

Authorities have not yet confirmed the cause of the accident, and an investigation has been launched to determine what led to the crash. The Ministry of Energy expressed deep sorrow and extended condolences to the families of the victims. Ras Tanura is home to one of Saudi Aramco’s major oil refineries and export terminals.

Preliminary reports suggest the helicopter was operating as part of duties related to the industrial zone, though further details remain under investigation.