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.
Egyptian Prime Minister Sherif Ismail said there was no "distress call" from the missing EgyptAir flight, but a "signal" was received from the plane.
The Egyptian army denied reports that it received a distress call from the plane.
It came after the Egyptian Civil Aviation Ministry said a military unit picked up a distress call.
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.