(AL-OMAR OIL FIELD BASE, Syria) — A spokesman for a U.S.-backed Syrian force fighting the Islamic State said Tuesday a military operation aimed at ousting the extremists from their last remaining area in eastern Syria will commence after separating or evacuating civilians holed up with them. Mustafa Bali said if the remaining militants estimated to be around 300 surrendered, there would be no need for a fight. The comments came as a Kurdish official and a Syria war monitor said that dozens of trucks arrived at the outskirts of the tiny enclave held by IS to bring out civilians remaining inside, believed to be in the hundreds. “We are working on either separating the civilians or evacuating them and raiding the place,” Bali said. Adnan Afrin, a commander with the U.S.-backed Syrian Democratic Forces, said a number of civilians and some fighters have turned themselves in and that the trucks went to the corridor to get them.