A plane carrying tourists to view Mount Everest has crashed in Nepal, killing all 19 passengers, reports.

The Beechcraft 1900D plane belonging to Buddha Air was carrying 13 foreign tourists, three Nepalese passengers and three crew members when it lost contact with the control tower at 07:31 on Sunday.

It is thought that the turboprop plane crashed while attempting to land in dense fog at Kathmandu’s Tribhuwan International Airport. The Buddha Air Flight 103 came down in Bisankunarayan village, south of the Nepalese capital, Katmandu.

Tourism Secretary Ganeshraj Joshi said that among the foreigners who died in the crash, two were U.S. citizens, 10 were Indian nationals and the other was Japanese.

The cause of the crash is unknown and being investigated.