Egypt’s foreign ministry has exchanged condolences with France over what it called the “fall” of an EgyptAir flight carrying 66 people from Paris to Cairo.
The statement was the first official admission that those on board were likely to have died.
The plane was carrying people from multiple nationalities including 30 Egyptians and 15 French nationals.
French President Francois Hollande said in a televised address that the plane had crashed early on Thursday.
The plane made “sudden swerves” mid-air and plunged before dropping off radars in the southern Mediterranean, Greece’s defence minister said.
“At 3:39am the course of the aircraft was south and south-east of Kassos and Karpathos [islands] … immediately after it entered Cairo FIR and made swerves and a descent I describe; 90 degrees left and then 360 degrees to the right,” Defence Minister Panos Kammenos told a news conference.
European air traffic network manager Eurocontrol said there were no weather issues at the time and in the vicinity of the area where the plane went missing.
Egypt’s aviation minister said terror attack or technical problem cannot be ruled out as cause of the plane’s crash.
In March, an EgyptAir plane was hijacked and diverted to Cyprus. The attacker later surrendered and all hostages were released.
An Airbus A321 operated by Russia’s Metrojet crashed in Egypt’s Sinai peninsula on October 31, 2015, killing all 224 people on board.
The plane was likely brought down by a bomb and the so-called Islamic State group said it had smuggled an explosive on board.