Russian authorities said Sunday that a plane with six people on board disappeared from radar over Afghanistan overnight after local Afghan police said they had received information about the plane crash.

Russian authorities said it was an “ambulance charter flight” from India via Uzbekistan to Moscow on a 1978-built French Dassault Aviation Falcon 10.

Police in northern Afghanistan received information about a plane crash in Badakhshan province, a police spokesman said on Sunday.

Zabihullah Amiri, a spokesman for the Badakhshan provincial government, told Reuters that a team had been sent to the crash site, but it was a remote area, more than 200 km from the capital Faizabad, and it would take the team 12 hours to get there.

An Afghan provincial police official said the accident happened overnight in the mountainous and remote Badakhshan region of Afghanistan’s far north.

He said there were no confirmed details about the type of plane, the cause of the crash or the casualties.

The Civil Aviation Authority of India said it was not a scheduled commercial flight or an Indian chartered aircraft and that “further information is awaited.”

Aircraft maker Dassault did not immediately respond to a request for comment, Reuters reported.