MOSCOW, Oct. 5 (Xinhua) -- At least 13 people were killed Friday after two buses collided on the Tver-Rzhev highway in west Russia's Tver region, the office of the regional governor Igor Rudenya said in a statement.

Emergency services staff working at the scene of a collision between two buses on a highway outside the city of Tver on October 5, 2018. Thirteen people died and two more were injured when two buses collided Friday on a highway northwest of Moscow, regional authorities said. (Photo: the Russian Emergency Situations Ministry)

"The accident occurred as a result of a head-on collision of a chartered Ford minibus and a bigger passenger LIAZ bus of the local Tver Avtotrans company. The minibus moved to the oncoming traffic lane used by the regular bus," it said.

Map: AFP

The 13 killed in the crash were all passengers of the Ford minibus, and three others who were injured were sent to a local hospital, it added.

The Tver regional division of the Emergencies Ministry said in a separate statement that the LIAZ driver and one LIAZ passenger were among the injured.

A probe is underway to find the cause of the accident.