After testing, the recovered black box from the EgyptAir Flight 804 plane that crashed in the Mediterranean on May 19, confirms that there was smoke on board.

Egyptian investigators confirmed the news, that there on June 29. EgyptAir Flight 804 bound to Cairo from Paris crashed into the Mediterranean Sea on May 19 killing all 66 passengers and crew on board. Theories of fire and blasts were prominent especially when the remains were recovered in pieces suggesting an explosion occurred. French and Egyptian experts reportedly used DNA testing to identify parts of the remains because it is impossible to recognize the body parts.

The recovered black box contains electronic messages sent by the plane and it showed smoke detectors were triggered in one of the plane's lavatories and the avionics part near the cockpit. This occurred minutes before the plane went off the radar.

The new data was obtained through the help of the black box recovered from 3,000 meters (9,800 ft) in the Mediterranean Sea. The data is consistent with evidence discovered from the aircraft's front section wreckage that "showed sign of high temperature damage", an Egyptian investigation committee shared with BBC.

The black box recorded shortly after takeoff at the Charles de Gaulle Airport in Paris and continued recording until the accident occurred at 37,000 feet, according to CNBC.

Before the black boxes were found, signals from the Airbus plane was detected by the French search vessel. Afterward, "pings" from the black box was heard leading the investigators to retrieve the boxes that hold the truth as to what really transpired before the EgyptAir Flight 804 crashed into tehe Mediterranean Sea.

More information is expected to arrive since the second black box is still being repaired as of the moment. There are several theories as to what could have caused the smoke or fire inside the plane, but up to this day, the reason is still unknown.