Egyptian security officials confirmed there were no survivors from among the 217 passengers and seven crew members on board the aircraft.
Most of the 100 bodies recovered so far from the site of the crash were burned, said the officials, speaking on condition of anonymity.
All passengers and crew were Russian citizens, said Adel Mahgoub, chairman of Egypt's civilian airport regulator.
Egyptian air traffic control had lost contact with the Airbus A321 23 minutes after it took off from the Red Sea resort of Sharm El-Sheikh for St Petersburg early today.
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Flight KGL9268 belonged to Kogalymavia airline, a small airline based in Western Siberia.
A criminal case has been opened against the airline for "violation of rules of flight and preparation for them," Russia's Ria news agency reported.
The reason behind the plane crash was yet to be ascertained but preliminary assessments by security and aviation officials indicated that it crashed in the Sinai Peninsula due to "technical reasons".
The debris of the Russian jetliner was found in an area in the south Al-Arish city in North Sinai, Egypt's civil aviation ministry said in a statement.
The wreckage was found in the Hasana area and bodies removed, along with the plane's black box. An official described the crash site as a "tragic scene" with bodies of victims still strapped to seats.