Searchers scouring the heavily traveled waters of the Mediterranean Sea for EgyptAir Flight 804 on Thursday have found the plane's wreckage, airline Vice Chairman Ahmed Adel told CNN's Christiane Amanpour.

The debris was about 150 nautical miles north of the Egyptian coast, Adel said. He did not elaborate on the location or condition of the wreckage but said the search and rescue operation was "turning into a search and recovery" mission.

Earlier, a spokesman for Greece's Hellenic National Defense General Staff had said crew aboard an Egyptian search aircraft had spotted two floating objects 210 nautical miles southeast of Crete. It's unclear whether those objects are part of the wreckage described by Adel.

The Airbus A320 carrying 66 passengers and crew disappeared early Thursday over the Mediterranean Sea as it flew from Paris to Cairo.

Speculation has centered on the possibility of a terrorist attack.

"Planes today just don't fall out of the sky," CNN aviation analyst Miles O'Brien said.

Egyptian Civil Aviation Minister Sharif Fathi said technical failures and terror are both possible explanations.

"But if you analyze this situation properly, the possibility of having a different action aboard, of having a terror attack, is higher than having a technical problem," Fathi said.

(CNN)