Investigators of the Russian plane crash in Egypt are "90 percent sure" the noise heard in the final second of a cockpit recording is an explosion caused by a bomb, a member of the investigation team said Sunday.
The Airbus A321 crashed 23 minutes after taking off from the Sharm al-Sheikh tourist resort on Oct. 31, killing all 224 passengers and crew. Islamic State militants fighting Egyptian security forces in the Sinai Peninsula said they brought it down.
"The indications and analysis so far of the sound on the black box indicate it was a bomb," said the Egyptian investigation team member, who asked not to be named due to sensitivities. "We are 90 percent sure it was a bomb."