Four Palestinians have been killed in Israeli attacks in the Gaza Strip, hospitals said on Sunday, as Israel hit another former school in the war-torn coastal territory. According to al-Awda hospital, three of the victims died in the shelling of a house in the Nuseirat refugee camp in the central Gaza Strip. A fourth Palestinian was killed in an attack in the Jabaliya refugee camp, the Kamal Adwan hospital in northern Gaza said. An Israeli military spokesman said they were investigating the reports. According to the Hamas-controlled Ministry of Health, 24 people were killed in the Mediterranea…