Russia begins Syria air strikes in its biggest Mideast intervention in decades

Moscow: Russia launched air strikes in Syria on Wednesday in its biggest Middle East intervention in decades, plunging the four-year-old civil war into a volatile new phase as President Vladimir Putin moved forcefully to stake out influence in the unstable region.

Moscow's assertion that it had hit Islamic State militants was immediately disputed by the United States and rebels on the ground. The attacks also raised the dangerous specter of Washington and Moscow running air strikes concurrently and in the same region, but without coordination.