A Bangladeshi airliner with 71 people on board has crashed while coming in to land at the international airport in the Nepali capital Kathmandu, killing at least 50 people. 

The state of the other people on the flight from the Bangladeshi capital, Dhaka, operated by USinfo-icon-Bangla Airlines, was not clear, airport spokesman Birendra Prasad Shrestha said.

"We are trying to bring the fire under control. Details are awaited," he said, adding that the airport had been shut down and all other flights diverted.

"We're now concentrating on evacuating the passengers."

Television images showed smoke rising from the crash site.

Mountainous Nepalinfo-icon is notorious for air accidents. Small aircraft often run into trouble at provincial airstrips.

A Thai Airways flight from Bangkokinfo-icon crashed while trying to land in Kathmandu in 1992 killing all on board.

US-Bangla Airlines is a unit of the US-Bangla Group, a U.S. Bangladeshi joint venture company.

The Bangladeshi carrier launched operations in July 2014 and operates Bombardier Inc (BBDb.TO) and Boeing (BA.N) aircraft.