Infrared Satellite Detects Flash Near Site Of Russian Metrojet Crash

The new evidence suggests an onboard explosion may have downed the airliner, killing 224.

11/02/2015 09:51 pm ET | Updated Nov 03, 2015

New evidence suggests an onboard explosion may have caused a Russian Metrojet airliner to break apart and crash in Egypt's Sinai peninsula over the weekend.

Infrared satellite images released by U.S. officials to NBC News show a heat flash near the location of the crash that killed all 224 passengers, the network reported. 

The sign of a flash contradicts speculation that the commercial airliner was downed by a missile. Instead, intelligence analysts told NBC, it suggests that the explosion may have originated on board the plane. 

"The speculation that this plane was brought down by a missile is off the table," the official told NBC. 

Russian officials expressed doubt after an Islamic State affiliate claimed responsibility for the crash, arguing that the terrorist organization likely lacks sophisticated weaponry needed to shoot down a plane from an altitude of 31,000 feet. 

"It's unlikely, but I wouldn't rule it out," the U.S. director of national intelligence, James Clapper, said of terrorist involvement. 

Meanwhile, the Russian airline on Monday denied that mechanical failure or pilot error could have caused the crash. 

"The only possible explanation could be an external impact on the airplane," said Alexander Smirnov, Metrojet's deputy director. Russia's top aviation official chided the company for "jumping the gun" on ruling out mechanical or pilot error. 

Some airlines, including Emirates, Lufthansa and Air France-KLM, have rerouted flights to avoid flying over Egypt's Sinai Peninsula until the investigation determines a cause. 

The Associated Press contributed to this report. 

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