The head of the international committee investigating the Russian plane crash that killed 224 people in Egypt's Sinai says a noise was heard in the last second of the cockpit voice recording.
Speaking Saturday at a news conference in Cairo, Ayman el-Muqadem says an analysis of the noise is underway to identify its nature. He says "all scenarios are being considered," including the explosion of a fuel tank or lithium batteries.
The British government and U.S. officials have said intelligence suggests the plane was downed by a bomb. The Islamic State group has claimed that it brought down the plane but did not provide any proof.
Meanwhile, Egyptian airport and security officials say an investigation has been launched into any local staff and ground crew in Sharm el-Sheikh that came into contact with the downed Russian Metrojet flight. The officials tell The Associated Press that authorities are questioning airport staff and have begun surveillance on those who worked on the flight that crashed a week ago. The officials spoke on condition of anonymity because they were not authorized to brief reporters.
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