Russian aircraft carried out strikes on the last rebel stronghold in northwestern Syria early Thursday, according to a monitoring group and rescue workers, raising fears of an all-out Syrian regime offensive to retake the area following a Moscow-brokered border deal with Turkey. The airstrikes targeted the Idlib, Hama and Latakia provinces amid intense artillery shelling and rocket fire, according to the independent Syrian Observatory for Human Rights. There were no immediate reports of casualties. …