A plane has crashed in a mountainous region near the town of Samirom, Isfahan, Iran, killing all 66 people onboard.

Operated by Iran’s Aseman Airlines, the crashed ATR72 twin-engine turboprop aircraft was carrying 60 passengers and six crew members.

It was flying from Tehran to Yasuj, situated in the southwestern part of Iran, when the incident took place.

The plane reportedly vanished from the flight radar on Sunday morning and descended in Samirom.

“IRCS immediately responded to the crash by dispatching 32 relief teams consisting of 120 rescuers and 26 vehicles.”

According to Aseman Airlines spokesman Mohammad Taghi Tabatabai, the aircraft crashed into Mount Dena, which is 1,400ft-tall, reported nbcnews.com.

The airline has suspected bad weather to be the prime cause of the crash, but it is yet to be confirmed.

Eyewitnesses have stated that the aircraft was apparently trying to make an emergency landing on a pasture when it crashed, reported local media.

A number of helicopters were deployed to search for the remains of the aircraft, but the foggy weather made it impossible for them to reach the crash site.

Non-governmental humanitarian organisation Iranian Red Crescent Society (IRCS) has dispatched its teams from different provinces to the crash area.

IRCS relief and rescue organisation head Morteza Salimi said: “IRCS immediately responded to the crash by dispatching 32 relief teams consisting of 120 rescuers and 26 vehicles from the provinces of Isfahan, Fars, Kohgiluyeh and Boyerahmad and Chaharmahal via Bakhtiari to the disaster area.”