Iran troops to join Syria war, Russia bombs group trained by CIA

A civil defense member tries to put out the flames on a burning military vehicle at a base controlled by rebel fighters from the Ahrar al-Sham Movement, that was targeted by what activists said were Russian airstrikes at Hass ancient cemeteries in the southern countryside of Idlib, Syria October 1, 2015. REUTERS/Khalil Ashawi

BEIRUT/MOSCOW (Reuters) - Hundreds of Iranian troops have arrived in Syria to join a major ground offensive in support of President Bashar al-Assad's government, Lebanese sources said on Thursday, a sign the civil war is turning still more regional and global in scope.

Russian warplanes, in a second day of strikes, bombed a camp run by rebels trained by the U.S. Central Intelligence Agency, the group's commander said, putting Moscow and Washington on opposing sides in a Middle East conflict for the first time since the Cold War.