Schools were shut in Khan Sheikhoun, an area under attack, because of the raids Elsewhere, Syrian Kurdish forces said they clashed with regime fighters in the divided northeastern city of Qamishli BEIRUT: Activists and a war monitoring group say Syrian government and Russian warplanes have targeted the southern edge of Idlib province with a series of airstrikes, ratcheting up the military pressure on the densely populated rebel-held bastion. The intense air raids come a day after Iran and Russia backed a military campaign in the rebel-held area despite Turkey’s pleas for a cease-fire. Turkey has troops and observations points that ring Idlib. The Britain-based Syrian Observatory for Human Rights reported more than 30 air raids Saturday on a number of towns and villages in southwestern Idlib and adjacent northern Hama province, an area targeted over the last few days and that overlooks government-controlled areas. Schools were shut in Khan Sheikhoun, an area under attack, because of the raids, the Observatory reported. Elsewhere, clashes between Kurdish forces and regime fighters in the divided northeastern city of Qamishli killed 18 combatants, the Kurdish forces and a war monitor said. The rare flare-up in the Kurdish-majority city near the Turkish border saw 11 regime fighters and seven Kurds killed, the Kurdish security forces known as Asayesh said in a statement. The Observatory reported the same death toll for the fighting near a Kurdish checkpoint in the city. The Asayesh said a regime “patrol opened fire on our forces with light and medium weapons, causing our forces to respond to this violation, which killed 11 regime fighters... and seven of our comrades”. The Observatory said the shootout started when Asayesh members at the checkpoint asked regime fighters aboard a patrol vehicle to step out but they refused. “When they did not comply, the shooting started on the car,” Observatory chief Rami Abdelrahman said, and the clashes escalated after both sides called in reinforcements. An AFP correspondent at the scene saw empty camouflaged pick-up trucks in the street. Some bore bullet holes, while traces of blood were visible on the tarmac, he said. Kurdish forces control most of Qamishli, but regime forces and allied militiamen hold part of the city and its airport. Deadly clashes last broke out between Kurdish forces and pro-regime fighters in Qamishli in April 2016, but ended days later with a truce. That fighting began with a scuffle at a checkpoint and, according to Kurdish security forces, killed 17 civilians, 10 Kurdish fighters and 31 regime troops and militia. With US-led support, Syria"s Kurds played a prominent role in the war against Daesh during which they seized large swathes of northern and northeastern Syria where they have set up automous institutions. The Damascus regime has vowed to reintegrate the Kurdish-held areas, by force if necessary. In late July, it opened talks with the Kurdish-led Syrian Democratic Forces on a negotiated settlement.