Israeli forces have moved into the Gaza Strip’s most populous area – killing at least 14 Palestinian guerrillas and 12 civilians as their offensive deepens.Witnesses say Israeli tank fire in Beit Lahiya, in the northeastern Gaza Strip, has left six people dead after they returned to their abandoned homes to take showers. As the number of casualties increase, the New York based Human Rights Watch has repeated its condemnation of Israel’s apparent use of white-phosohorus munitions in densely populated areas. The chemical can severely burn people and set structures and fields on fire. Israel refuses to reveal which weapons its employing but it does says that all its arms are being used in accordance with international law. Despite the intensified bombing campaign at least some aid is arriving in Gaza. Two Spanish planes have landed in the region carrying 54 tonnes of essentials like food, nappies, tents and hygenic supplies. However, there are no guarantees it will get through to those who need it most.