More dramatic images and videos emerged of the crash of Asiana Airlines Flight 214.
A video obtained by CNN of Saturday's crash at San Francisco International Airport shows the plane approaching with its nose up before hitting the tarmac hard, with the right wing lifting after impact.
Here are two other images posted on social media:
The plane was flying significantly below its target speed and was "approaching a stall" moments before it crash landed at San Francisco International Airport, a federal official said Sunday.
The flight data recorder indicated "throttles at idle and airspeed slowed below the target airspeed" of 137 knots, said Deborah Hersman, chairwoman of the National Transportation Safety Board.
Hersman said data from the plane's onboard recording device indicated that the aircraft was approaching a stall. She said there was a call to the crew to increase speed seven seconds before impact.
"The throttles were advanced a few seconds prior to impact, and the engines appeared to respond normally," she said.
Moments later, the Boeing 777 jetliner's tail hit a sea wall separating the runway from San Francisco Bay before slamming into the runway, killing two and injuring dozens of others.
Asked whether pilot error may been a factor, Hersman said, "Everything is on table right now. Nothing has been ruled out. We will not speculate and will not draw conclusions" until more is known.
There was no discussion before impact of any anomalies or problems with the aircraft's approach to the airport, Hersman said. The plane had been cleared for visual approach -- meaning it could be landed manually -- and the aircraft was configured for landing, with its flaps at 30 degrees and gear down, she said.