U.S. intel suggests ISIS bomb brought down Russian jet

British Foreign Minister Philip Hammond said his government believes there is a "significant possibility" that an explosive device caused the crash. And a Middle East source briefed on intelligence matters also said it appears likely someone placed a bomb aboard the aircraft.

Metrojet Flight 9268 crashed Saturday in Egypt's Sinai Peninsula after breaking apart in midair, killing all 224 people on board. It was en route to St. Petersburg from the Red Sea resort of Sharm el-Sheikh.

The latest U.S. intelligence suggests that the crash was most likely caused by a bomb planted on the plane by ISIS or an affiliate, according to multiple U.S. officials who spoke with CNN.

The officials stressed that no formal conclusion has been reached by the U.S. intelligence community and that U.S. officials haven't seen forensic evidence from the crash investigation.

Intelligence also suggests someone at the Sharm el-Sheikh airport helped get a bomb onto the plane, one U.S. official said.

"This airport has lax security. It is known for that," the official said. "But there is intelligence suggesting an assist from someone at the airport. "

Egyptian authorities, who are leading the investigation into the crash, haven't publicly responded to reports on U.S. intelligence. Since the crash, they've downplayed the possibility that terrorism could be involved.

 

(CNN)