Saudi authorities say a helicopter belonging to Saudi Aramco crashed in Ras Tanura on Sunday at about 6:00 a.m. local time, according to the Saudi Press Agency, citing an official source at the Ministry of Energy.

The statement said all 14 passengers aboard were killed. The report also said the passengers were Saudi citizens.

The Ministry of Energy said investigations are ongoing in coordination with relevant authorities to determine what caused the crash, and it extended condolences to the families of the victims.