CAIRO – Arab foreign ministers meeting in Cairo Saturday demanded that Israel immediately halt its campaign in Gaza as Israeli aircraft bombed Hamas government buildings in Gaza Saturday, including the prime minister's office, after the Jewish state's cabinet authorized the mobilization of up to 75,000 reservists in preparation for a possible ground invasion. Arab ministers sought an immediate end to the Israeli aggression and stress their full support for the Gaza Strip, a diplomat said. They also planned sending a delegation headed by Arab League Secretary General Nabil Al-Arabi and other foreign ministers into Gaza “to stress support for the Palestinian people.” They also stressed their support for Egyptian efforts to achieve a long-term truce between Israel and the Palestinian factions in Gaza. Turkish Prime Minister Recep Tayyip Erdogan, who flew into Egypt, said that Israel would be held to account for the children among 40 people dead in three days of air strikes on Gaza. “Everyone must know that sooner or later there will be a holding to account for the massacre of these innocent children killed inhumanely in Gaza,” he said in a speech at Cairo University. Hamas said Israeli missiles wrecked the office building of Prime Minister Ismail Haniyeh - where he had met Friday with the Egyptian prime minister - and struck a police headquarters. In the Israeli Mediterranean port of Ashdod, a rocket ripped into several balconies. Police said five people were hurt. With Israeli tanks and artillery positioned along the Gaza border and no end in sight to hostilities now in their fourth day, Tunisia's foreign minister traveled to the enclave in a show of Arab solidarity. Officials in Gaza said 41 Palestinians, nearly half of them civilians including eight children and a pregnant woman, had been killed since Israel began its air strikes. Three Israeli civilians were killed by a rocket Thursday. In Cairo, a presidential source said Egyptian President Mohamed Morsi held four-way talks with the Qatari Emir, the prime minister of Turkey and Hamas chief Khaled Meshaal. Egypt has been working to reinstate calm between Israel and Hamas after an informal ceasefire brokered by Cairo unraveled over the past few weeks. Meshaal has already held a round of talks with Egyptian security officials. – Agencies