In its final moments, a sudden noise was heard in the cockpit of the Russian plane that crashed in Egypt’s Sinai Peninsula last week. According to the Associated Press, the voice recording findings fuel theories that the plane may have been struck by a bomb.

The plane, Airbus 321, broke up at an altitude of 30,000 feet and crashed in a mountainous region, killing all 224 people aboard on Oct. 31. CNN is reporting that flight data for Metrojet Flight 9268 confirms the explosion was not accidental. But some investigators say that it’s still to early to know.

“All scenarios are being considered ... it could be lithium batteries in the luggage of one of the passengers, it could be an explosion in the fuel tank,” El-Muqadem, leader of the investigation committee looking into the crash.

Meanwhile, Russian President Vladimir Putin has announced that he will suspend Russian air traffic with Egypt until the cause of the crash is determined.

[Image via Getty]

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