Earlier Putin expressed his condolences to the passangers' relatives.
November 1st declared a day of mourning in Russia for those killed in the plane crash— President of Russia (@KremlinRussia_E) 31 октября 2015
“As a result of the air crash, which took place on October 31, 2015 in the Arab Republic of Egypt, numerous causalities were reported. Expressing sorrow and condolences to victims' relatives and friends, I declare November 1 a day of morning in the Russian Federation,” the Kremlin said, citing Putin’s statement.
Initial reports about the fate of the airliner were conflicting, with the head of Egypt's central air traffic accident authority saying the plane was safe and heading for Turkey.