Search teams have retrieved the cockpit voice and flight data recorders from the EgyptAir plane which crashed into the Mediterranean in May, killing all 66 on board.
It is hoped analysis of the black boxes will shed light on why the plane crashed en route from Paris to Alexandria.
At present no militant group has claimed responsibility for bringing down the aircraft.
A French ship has picked up signals from the depths of the Mediterranean Sea which is presumed to be from black boxes of crashed plane, Egyptian officials have told Associated Press.
Investigators are searching in some of the deepest waters of the Mediterranean for flight recorders from the Airbus A320 which crashed on May 19, killing 66 people.
The jet's flight recorders or "black boxes" are designed to emit acoustic signals for 30 days after a crash.
Work has begun on analysing data from the two black boxes from the fated EgyptAir flight that crashed into the sea in May.
French air accident investigators confirm the signal detected earlier is from a flight recorder.
The head of Egypt's forensics authority said it is 'too early' to know what caused the EgyptAir plane to crash into the Mediterranean sea.