The removal of the bodies from the scene of the Metrojet crash in Egypt was completed Tuesday as 28 bags containing victims' remains were flown to Russia for DNA testing, local aviation ministry sources said.
Authorities collected suitcases and the personal belongings of the 224 victims from Saturday's crash over northern Sinai. Those items will also be DNA tested in Russia as officials continue to identify the passengers.
The mystery over the cause of the disaster deepened early Tuesday when Russian news agency TASS reported that investigators found "elements" in the wreckage that were not part of an Airbus A321. An adviser to Egypt's aviation minister denied the report.
Meanwhile, a senior U.S. defense official told NBC News that an American infrared satellite detected a heat flash at the time and vicinity of the crash and intelligence agents have ruled the possibility that a missile brought down the jet.
But the flash could indicate some kind of explosion on the aircraft itself, either a fuel tank or a bomb, according to the official.