Egyptian officials probing the crash of EgyptAir Flight 804 said Monday the plane veered off course before plunging into the sea, suggesting an abrupt in-flight explosion didn’t bring down the aircraft.

The Airbus Group SE A320 plane bound for Cairo from Paris deviated from its course while flying at 37,000 feet, first turning left before rolling to the right and completing a full circle, investigators said in their latest update into the May 19 crash that killed all 66 people onboard.

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