At the moment it is not clear whether the intel came from intercepted communications between known terrorist operatives, or physical evidence
As reported, one of the working theories is that a bomb was planted at or near the fuel line or where it attaches to the engine.
Earlier, the U.S. said they would exchange information about the crash with Egypt and Russia.
Russian Kogalymavia passenger plane, carrying out flight from Sharm el Sheikh to St. Petersburg, crashed on Saturday morning, Oct. 31, in Egypt. 224 passengers were on board, including seven crew members.