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 Greek air safety official has said debris found in the Mediterranean Sea does not belong to the missing EgyptAir plane, according to the Associated Press.
Greek officials now believe these items "do not belong to an aircraft".
Earlier, the Egypt Civil Aviation authority reported "lifejackets" and "plastic items" were found floating near the site where EgyptAir MS804 was believed to have crashed.
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.