November 11, 2015

"Investigators analyzing the deadly crash of a Russian jet in Egypt uncovered intelligence about a 'a two-hour timer,'  though it is not clear whether the reference came from intercepted communications between known terrorist operatives, or physical evidence, a source familiar with the investigation told Fox News.

A separate source, also not authorized to speak on the record, said that based on the facts so far, one of the working theories is that a bomb was planted at or near the fuel line or where it attaches to the engine, with the fuel burning off the explosive. This theory would explain the apparent lack of residue immediately found, the source says."

Read more:

http://www.foxnews.com/world/2015/11/11/bomb-may-have-been-planted-near-russian-jet-fuel-line-counterterror-source-says/