Egyptian investigators say a flight data recorder shows there was smoke aboard the EgyptAir flight that crashed into the Mediterranean Sea May 19, killing all 66 people on board.
The recorder shows the smoke was in the lavatory and on some of the onboard electronics.
This is consistent with signals from the plane to air traffic controllers just before it crashed while en route from Paris to Cairo. Investigators said the recording stopped at an altitude of 37,000 feet (11,278 m).
Investigators also say heat damage and soot was found on the front part of wreckage of the Airbus A320.
A second black box, the cockpit voice recorder, was recovered but damaged. It is being repaired in Paris and could provide more clues into the cause of the crash.
The pilots did not send out any distress calls and no terrorist group has claimed responsibility for bringing the plane down.