SAN FRANCISCO - An Asiana Airlines flight crashed while landing at San Francisco International Airport on Saturday, killing at least two people, injuring dozens of others and forcing passengers to jump down the emergency inflatable slides to safety as flames tore through the plane.
One person was unaccounted for from among the 307 passengers and crew, said airport spokesman Doug Yakel. He said 181 people were taken to hospitals. There were 291 passengers and 16 crew members.
San Francisco Fire Chief Joanne Hayes-White said the investigation has been turned over to the FBI and terrorism has been ruled out.
The Federal Aviation Administration said Flight 214 crashed while landing before noon Tucson time. A video clip posted to YouTube showed smoke coming from a jet on the tarmac. Passengers could be seen jumping down the emergency slides.
Television footage showed the top of the fuselage was burned away and the entire tail was gone. One engine appeared to have broken away. Pieces of the tail were strewn about the runway. Emergency responders could be seen walking inside the burned-out wreckage.
It wasn't immediately clear what happened to the plane as it was landing, but some eyewitnesses said the aircraft seemed to lose control and that the tail may have hit the ground.
Stephanie Turner saw the plane going down and the rescue slides deploy, but returned to her hotel room before seeing any passengers get off the jet, she told ABC News. Turner said when she first saw the flight she noticed right away that the angle of its approach seemed strange.
"I mean we were sure that we had just seen a lot of people die. It was awful," she said. "And it looked like the plane had completely broken apart. There were flames and smoke just billowing."
Kate Belding was out jogging just before 11:30 a.m. on a path across the water from the airport when she noticed the plane approaching the runway in a way that "just didn't look like it was coming in quite right."
"Then all of a sudden I saw what looked like a cloud of dirt puffing up, and then there was a big bang and it kind of looked like the plane maybe bounced (as it neared the ground)," she said. "I couldn't really tell what happened, but you saw the wings going up and (in) a weird angle."
"Not like it was cartwheeling," she said, but rather as though the wings were almost swaying from side to side.
The National Transportation Safety Board said it was sending a team of investigators to investigate the crash. NTSB spokeswoman Kelly Nantel said NTSB Chairman Deborah Hersman would head the team.
Boeing said it was preparing to provide technical assistance to the NTSB. The maker of the plane's engines, Pratt & Whitney, said it was cooperating with authorities investigating the crash.
Asiana is a South Korean airline, second in size to national carrier Korean Air. It has recently tried to expand its presence in the United States, and joined the Star Alliance, which is anchored in the U.S. by United Airlines.
The 777-200 is a long-range plane from Boeing. The twin-engine aircraft is one of the world's most popular long-distance planes, often used for flights of 12 hours or more. The airline's website says its 777s can carry between 246 to 300 passengers.
The flight was 10 hours and 23 minutes, according to Flight-Aware, a flight tracking service.
The most notable accident involving a 777 occurred on Jan. 17, 2008 at Heathrow Airport in London.
The last time a large U.S. airline lost a plane in a fatal crash was an American Airlines Airbus A300 taking off from John F. Kennedy International Airport in New York in 2001.
Flying remains one of the safest forms of transportation: There are about two deaths worldwide for every 100 million passengers on commercial flights, according to an Associated Press analysis of government accident data.