An EgyptAir flight on its way to Cairo from Paris disappeared from radar Wednesday night, according to a tweet from the airline, reports USA Today.
"An informed source at Egyptair stated that Flight no MS804, which departed Paris at 23:09 (CEST), heading to Cairo has disappeared from radar," the tweet read.
There were 56 passengers on board the Airbus A320 and 10 crew members, the airline said via Twitter. That number included two babies and a child, the airline said.
The families of the passengers were gathering at Cairo International Airport, where the airline was providing doctors, translators and other support and services. Several distressed family members collapsed at the airport, according to the Associated Press.
The aircraft disappeared after entering Egyptian airspace, according to EgyptAir. It vanished over the Mediterranean Sea at 37,000 feet, according to flight tracking services and EgyptAir.
Greek traffic controllers notified the airline that they'd lost contact with the plane, Ehab Mohy el-Deen, the head of Egypt's navigation agency, told The New York Times.
"They did not radio for help or lose altitude," he told the news organization. "They just vanished."
The aircraft most likely crashed into the sea, Ihab Raslan, a spokesman for the Egyptian civil aviation authority, told SkyNews Arabia.
EgyptAir listed the nationalities of the passengers as: 30 Egyptians, 15 French, two Iraqis and one each from Sudan, Chad, Portugal, Algeria, Canada, Great Britain, Belgium, Kuwait and Saudi Arabia.