Therefore, the cause has to be an external impact with the plane.
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“There are tell-tale signs that they will quickly be able to establish that”.
Burnt tissue from the bodies is to be tested for traces of explosives.
Mr Sisi told the BBC: “It takes time to clarify the incidents”.
German and French specialists from Airbus, the plane’s manufacturer, and from Ireland, where the plane was registered, are also looking at the flight recorders for clues to the cause of the accident.
“Before the moment of the disappearance of the aircraft from radar screens, sounds are recorded which are not characteristic of a normal flight”, Interfax quoted an unnamed security source in Cairo as saying.
The signal was then lost and the plane went down in a remote part of the Sinai Desert, without any distress call.
Alexander Agafonov, head of the Russian rescue mission in Egypt, said in a televised conference with other officials that searchers found no more bodies Tuesday after combing an area of 10.8 square miles.
The jet crashed over the Sinai Peninsula early Saturday, killing all 224 people on board. Kamal added that his joint investigation team has all the tools at its disposal for rooting out the true cause of the crash.
However, a preliminary analysis of the wreckage has not yielded any information underpinning the Kogalymavia authorities’ claims.
Egyptian Civil Aviation chief Hossam Kamal said safety checks before the flight did not turn up any problems, and he said the pilot did not issue a distress call before the plane disappeared.
Cairo said Egyptian and Russian investigators are examining the so-called black boxes.
The Airbus 321 is thought to have broken up in mid-air.
United States officials pointed to an explosion on the plane itself as the most likely cause, but there is no way of telling from satellite images whether it was caused by a fuel tank or possible bomb on board.
“And the tail or rear pressure bulkhead of the aeroplane will fail and rip away”. Three Ukrainians and a Belarussian were among the fatalities. There will be tell-tale bending of metal in certain directions.
Owen said it would be hard to rule out a bomb blast just because evidence of one had not been discovered.
American intelligence said satellites show no heat trail heading toward the airliner, meaning it would not have been hit by a missile.
James Clapper, the USA director of national intelligence, said Monday that while there is no direct evidence of any terrorist involvement yet, it could not be excluded that the plane was brought down by IS group extremists.
President Abdel-Fattah El-Sisi’s comments marked the latest attempt by Egyptian officials to shift the narrative away from terrorism.
The U.S. has banned its diplomatic staff from travelling anywhere in the Sinai peninsula.
Now, the crash of a Russian passenger jet that took off from the resort has threatened its reputation.
Even the plausibility of such an unconfirmed claim underscores the tenuous state of both public security and the tourist industry in Egypt more than two years after a military takeover.
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The airline said captain Valery Nemov had over 12,000 hours of flying experience, including 3,860 hours on an Airbus A321, the model of the crashed jet.
