Video Mona Farouk What she said about the scandalous video with Khaled Youssef and Shima Haj

from

(CNN) 

A noise was heard in the final second of the cockpit voice recording on Metrojet Flight 9268 as it ascended on autopilot before apparently breaking up about 23 minutes after takeoff, the head of Egypt's investigation said Saturday.

 

The Russian passenger jet crashed in the Sinai Peninsula last weekend, killing all 224 people aboard.

While U.S. and UK officials have said there may have a bomb aboard the jet, the chief of the investigation said authorities have not reached any conclusion as to what brought down the flight.

"All the scenarios are out on the table," Ayman al-Muqaddam told reporters. "We don't know what happened exactly."

Still, European investigators who analyzed the two flight recorders are saying the crash is not an accident, CNN affiliate France 2 reported Friday. 

The investigators said the cockpit voice recorder indicates an explosion, and the flight data recorder confirms the explosion was not accidental, and there was no sign of mechanical malfunction during the initial part of the flight, France 2 reported.

Everything was fine during the first 24 minutes, then in a fraction of a second there was a blackout and no further cockpit conversation, convincing investigators there was a bomb on board, according to France 2.