EgyptAir Flight 804 from Paris to Cairo disappeared from radar over the Mediterranean Sea with 66 people on board early Thursday. Here's what we know so far:

• Greek controllers tried to reach the Airbus A320 when it crossed through Greek airspace but got no response.

• When the plane reached Cairo airspace, it swerved sharply then plunged from 37,000 feet into the Mediterranean, Greece says.

• A distress signal was detected in the vicinity where the flight disappeared from radar 2 hours later, but it could have come from another vessel.

• The cause behind the disappearance is more likely terrorism than a technical issue, Egypt's civil aviation minister says. CNN