A helicopter, carrying employees of a contractor from oil major Rosneft’s Suzun oil field, crashed in northwest Siberia on Oct. 21 killing 19 people on board, Russia’s Federal Air Transport Agency said on Oct. 22.

Three crew members and 16 passengers died when the Russian-made Mi-8 helicopter came down late on Oct. 21 in adverse weather conditions.

Two survivors were injured and a third unscathed, TASS news agency reported, citing a regional health official.

The helicopter was part of the Vankor deposit, Russia’s northernmost onshore oil production project.