AT least 50 people have died after a plane from Bangladesh crashed and burst into flames yesterday as it landed in Kathmandu, Nepal’s capital, officials and witnesses said.

The exact number of dead and injured on board the plane, which was carrying 71 people, remains unclear amid the chaos of the crash, but a spokesman for Nepal’s army said it was clear that at least 50 people had died.

Officials at Kathmandu Medical College, the closest hospital to the airport, said they were treating 16 survivors.

US-Bangla Airlines flight BS211 from Dhaka to Kathmandu was carrying 67 passengers and four crew members.

An AP journalist who arrived at the scene soon after the crash saw the twin-propeller plane broken into several large pieces, with dozens of firefighters and rescue workers clustered around the wreckage in a grassy field near the runway

Hundreds of people stood on a nearby hill, staring down at what remained of the Bombardier Dash 8.

The plane swerved repeatedly as it prepared to land in Kathmandu, according to Amanda Summers, an American citizen working in Nepal. The crowded city sits in a valley in the Himalayan foothills.

“It was flying so low I thought it was going to run into the mountains,” said Summers, who watched the crash from the terrace of her home office, not far from the airport. “All of a sudden there was a blast and then another blast.”

Fire crews put out the flames quickly, perhaps within a minute, she said, though for a time clouds of thick, dark smoke rose into the sky above the city.

The plane had circled the airport twice as it waited for clearance to land, Mohammed Selim, the airline’s manager in Kathmandu, explained in a TV report.

Medical student Nitin Keyal was about to board a domestic flight when he saw the plane coming in.

“It was flying very low,” he said. “Everyone just froze looking at it. You could tell it wasn’t a normal landing.”

He said the aircraft landed just off the runway, broke apart and burst into flames. “For a few minutes no-one could believe what was happening. It was just terrible,” he said.

US-Bangla Airlines operates Boeing 737-800 and smaller Bombardier Dash 8 Q-400 planes.

The airline, part of US-Bangla Group, is based in the Bangladeshi capital, Dhaka, and flies to several domestic and international destinations. The parent company is involved in a number of industries, including real estate, education and agriculture.

“The aircraft was permitted to land from the southern side of the runway flying over Koteshwor, but it landed from the northern side,” Sanjiv Gautam, director general of the Civil Aviation Authority of Nepal, was reported as saying by the Kathmandu Post.

“We are yet to ascertain the reason behind the unusual landing.”

However, US-Bangla Airlines chief executive Imran Asif has blamed Kathmandu air traffic control.

“There were wrong directions from the tower. Our pilot was not at fault,” he told reporters.

Airport general manager Raj Kumar Chettri told Reuters news agency that the plane hit the airport fence before touching ground.

The pilot told flight controllers everything was OK soon before landing, but did not reply when told his alignment was not correct, he said.

One of the survivors, Nepalese travel agent Basanta Bohora, described from his hospital bed what he had experienced.

“All of a sudden the plane shook violently and there was a loud bang afterwards,” he was quoted as saying by the Kathmandu Post.

“I was seated near the window and was able to break out of the window. I have no recollection after I got out of the plane, someone took me to Sinamangal Hospital, and from there my friends brought me to Norvic [Hospital]. I have injuries to my head and legs, but I am fortunate that I survived.”

Kathmandu’s airport has been the site of several deadly crashes. In September 2012, a Sita Air plane carrying trekkers to Mount Everest hit a bird and crashed shortly after take-off, killing all 19 on board.