The Mi-8T helicopter that disappeared from radar on Saturday was carrying 19 tourists and three crew.

The wreckage was found on Sunday morning in a hilly area, Kamchatka Governor Vladimir Solodov said on Telegram.

Footage posted to the messaging app by Russia’s emergencies ministry showed helicopter debris lying near a slope close to a large wooded hill. Officials said the wreckage was found near the location where the helicopter went off radar.

An emergency ministry official, Ivan Lemikhov, said17 bodies had been found so far and searches for those still missing had been paused, slated to resume at daybreak on Monday.

Russia’s Interfax news agency reported that pilot error, possibly caused by fog, was the main theory regarding the cause of the crash.

Earlier, earlier officials said that thick fog was hampering rescuers’ efforts.

The aircraft was owned by Vityaz-Aero, a Kamchatka-based company that organises flights for tourists.

Designed during the Soviet-era, the Mi-8 helicopter is still widely used in Russia.