GAZA CITY, Palestine The Israeli army on Thursday killed at least four Palestinians, including two sisters, in the ongoing onslaught on the northern Gaza Strip. Eyewitnesses told Anadolu that three Palestinians, including two little sisters, were killed and others injured in Israeli artillery shelling of areas in Jabalia. The Israeli army heavily struck the eastern areas of the Jabalia refugee camp, and blew up homes and residential areas. A fourth Palestinian was killed in Jabalia by an