The strikes came as tensions mounted between archfoes Iran and the United States after Washington blamed Tehran for weekend attacks on Saudi oil installations BEIRUT: Overnight airstrikes killed 10 pro-Iranian Iraqi militiamen in eastern Syria, a war monitor said Tuesday, without specifying who carried them out. The strikes targeted “three positions of the (Iranian) Revolutionary Guards and allied (Iraqi) militias” in Albu Kamal, in the Euphrates Valley just across the border from Iraq, the Syrian Observatory for Human Rights said. “Ten Iraqis from pro-Iranian militias were killed,” the Britain-based monitor said. The strikes came as tensions mounted between archfoes Iran and the US after Washington blamed Tehran for weekend attacks on Saudi oil installations. They were the second to hit pro-Iranian forces in eastern Syria in little more than a week. On Sept. 9, airstrikes killed 18 fighters, including Iranians, according to the Observatory. In June last year, strikes near the Iraqi border killed 55 fighters, most of them Syrian or Iraqi. A US official speaking on condition of anonymity said Israel was responsible. Much of the east of Syria was held by Daesh militants before their defeat in March. It is now divided by the Euphrates Valley into a zone held by forces loyal to the Syrian regime and its ally Iran and another held by the Kurdish-led Syrian Democratic Forces and their allies in a US-led coalition, which has in the past carried out air raids on pro-regime forces. Meanwhile, the leaders of Turkey, Russia and Iran agreed on Monday to ease tensions in northwest Syria’s Idlib region, but disagreements between the countries appeared to linger, especially over the threat from Daesh. The summit of the three countries aimed to find a lasting truce in Syria. Recent attacks by the regime forces risk deepening regional turmoil and pushing a new wave of migrants toward Turkey. “We are in a period when we need to take more responsibility for peace in Syria, when we (three countries) need to carry more weight,” Turkey’s Tayyip Erdogan said, adding that all three leaders were in agreement that a political solution was necessary to end the crisis in Syria.