US shoots down Syria warplane that 'hit allies'

An American fighter jet has for the first time downed a Syrian warplane that Washington accused of attacking US-backed fighters, in a new escalation between the United States and regime forces.The incident further complicates the country's six-year war and comes as a US-led coalition and allied fighters battle to oust the Islamic State group from its Syrian bastion Raqa.Government ally Iran also Sunday launched missiles from its territory against alleged IS positions in eastern Syria for the fir