UPDATE: Found Debris Not From EgyptAir Paris-to-Cairo Flight, Egypt Official Says

President Obama has been briefed, and the U.S. Navy said it is ready to assist, after an EgyptAir flight carrying 66 people from Paris disappeared on its way to Cairo early Thursday morning and Egyptian officials listed terrorism as a possible cause.

After hours went by with no sign of the plane, EgyptAir confirmed that bits of wreckage were found near the Greek island of Karpathos, about 250 miles from the Egyptian coast. The statement gave no other details.

But the head of the Greek air safety authority Athanassios Binos said the found wreckage is not from an airplane.

"Up to now the analysis of the debris indicates that it does not come from a plane," Binos said, according to the BBC. "My Egyptian counterpart also confirmed to me that it was not yet proven that the debris came from the EgyptAir flight when we were last in contact around 1745 GMT."

Homeland security adviser Lisa Monaco met with Obama about the incident Thursday morning, before the wreckage was sited, Reuters reported, and the president asked to be updated throughout the day.

A military official told CNN that the U.S. Navy was prepared to provide whatever assistance is needed.

It was not immediately clear whether the plane's disappearance was a terrorist attack or an accident. Egyptian Civil Aviation Minister Sharif Fathy would not rule out either.

"We do not deny there is a possibility of terrorism or deny the possibility of technical fault," Fathy told reporters in Cairo. "I will continue to use the term missing plane until we find any debris."

Fathy added that the “possibility of a terror attack is higher than that of a technical error."

Egypt Prime Minister Sherif Ismail said the plane did not issue a distress call before it vanished from radar.

Greece's military offered its assessment.

“It turned 90 degrees left and then a 360-degree turn toward the right, dropping from 38,000 to 15,000 feet and then it was lost at about 10,000 feet,” Greek Defense Minister Panos Kammenos said.

Photo Credit: Bernard Dupont via Flickr