The explosion onboard the Russian plane could have arranged for the leader of the group "the Sinai province"

According to British intelligence, Egyptian priest by the name Abu Osama al-Masri last year signed an agreement with terrorists DL. And for the execution of criminal intent was recruited by an airport staff member that he planted a bomb in the Luggage compartment. London has already offered Moscow help in the search and apprehension of the perpetrators of the attacks.