Civilians fled heavy bombings in northern Gaza on Thursday as Israeli troops advanced on Jabalia refugee camp, leaving many trapped in the line of fire. “The bombardment has not stopped. Every minute there are shells, rockets and fire on the buildings and everything that moves”, Areej Nasr, 35, told AFP after fleeing from Jabalia camp to Gaza City Thursday. She said those wounded in strikes could not be rescued. “No ambulance has arrived, and no one is assisting the wounded. There are dozens lying on the ground,” Nasr said. The Israeli army, which said it had surrounded Jabalia over the weeken…