The United Nations has suspended its relief operations in Gaza after its headquarters came under Israeli fire. At least three people are said to have been hurt after the complex was hit by white phosporous munitions which Israel maintains it uses within the framework of an international ban.It comes amid intense fighting and bombardments in Gaza. Despite reports of progress in ceasefire talks, Israeli tanks and artillery have been pounding the city in the most relentless shelling in nearly three weeks. This morning an explosion blasted a tower block that houses the offices of Reuters news agency and several other international media organisations. As the offensive continues, diplomatic efforts to end the conflict are intensifying, with Israel’s chief negotiator due in Cairo to discuss an Egyptian ceasefire plan. Germany’s Foreign Minister, Frank-Walter Steinmeier, has also held talks with Israeli’s President Shimon Peres. More than a 1,000 Palestinians are now said to have been killed. Israeli military officials say they attacked 70 military targets overnight, including a mosque they say was being used to store weapons.