A passenger plane carrying 22 people has gone missing in Nepal. The aircraft took off from Lamidanda Airport, 162 km (101 miles) east of Kathmandu and was heading to the capital. Ram Prasad Neupane, head of the civil aviation authority, said emergency services had been alerted and a search and rescue effort was under way. There were 19 passengers and three crew members on board the plane belonging to small domestic airline Tara Air. Two army helicopters have flown to the remote area to search for the Twin Otter plane.