Satellite detected heat flash at time Russian jetliner went down...
ST. PETERSBURG, Russia (CBS NEWS) -- Mystery and confusion surrounded the final moments of a Russian jetliner that plummeted suddenly from high altitude to the Egyptian desert, killing all 224 people aboard. The airline Monday ruled out pilot error or a technical fault, but Russian aviation officials dismissed those comments as premature.
CBS News' national security correspondent David Martin reports a U.S. infrared satellite detected a heat flash over the Sinai at the time the Russian plane went down. The data is still being analyzed in an effort to determine what caused the flash. One possibility is a bomb, but an explosion in a fuel tank or engine as the result of a mechanical failure is also possible.
Some aviation experts raised the possibility that a bomb on board the Metrojet Airbus A321-200 brought it down, while others cited an incident in 2001 when the aircraft grazed the runway with its tail while landing.
James Clapper, the U.S. director of national intelligence, said that while there is no direct evidence of any terrorist involvement yet, it couldn't be excluded that the plane was brought down by Islamic State of Iraq and Syria (ISIS) extremists in the Sinai Peninsula.
"It's unlikely, but I wouldn't rule it out," he told reporters in Washington.
Asked if a terrorist attack could be ruled out, President Vladimir Putin's spokesman, Dmitry Peskov, said: "No versions could be excluded."