IAF planes on Saturday dropped leaflets warning Gaza residents of an escalation in attacks, as southern Israel came under more Palestinian rocket fire. "The IDF will escalate the operation in the Gaza Strip," the leaflets said in Arabic. "The IDF is not working against the people of Gaza but against Hamas and the terrorists only. Stay safe by following our orders." The leaflets urged Gaza residents not to help Hamas, and to stay away from its members. The Israeli military said more than 15 terrorists were killed in overnight fighting. It said aircraft attacked more than 40 targets including 10 rocket-launching sites, weapons-storage facilities, smuggling tunnels, an anti-aircraft missile launcher and gunmen.