Iran launched a barrage of missiles at American forces in the Middle East early Wednesday as the U.S. partnered with Saudi Arabia to strike Tehran-backed militias in neighboring Iraq, killing at least 20 fighters. Six Iranian advisers were killed in the U.S.-Saudi strike, two Iraqi militia officials told the Associated Press. It was not immediately clear if the advisers were included in the fighters who were killed. The militia officials spoke on condition of anonymity because they were not authorized to comment publicly. The flare-up on multiple fronts, after several days of relative calm, raised the risk of a return to all-out war. It also underscored the difficulty of winding down a five-month conflict that has jolted the world economy and is unpopular among Americans. The fighting was also likely to add to concerns that the U.S. is further drawing down already diminished stockpiles of sophisticated munitions needed to defend its bases and allies.

Full report : Iran resumes missile attacks as US and Saudis strike Tehran-backed militias in Iraq.