Osama bin Laden has called for Muslims to wage a holy war against Israel over the invasion of Gaza. The al-Qaeda leader called for jihad in an audio tape that appeared on Islamist websites. In response, the US said it demonstrated bin Ladens isolation and it was merely an effort to raise money. The news came as United Nations Secretary-General Ban Ki Moon visited the Middle East to press for an immediate ceasefire in the Gaza Strip. The Hamas-run Health Ministry in Gaza has said 1,010 Palestinians - including over 670 civilians - have been killed in the offensive which began on December 27. Around 4,700 people have been wounded. Ten Israeli soldiers and three civilians hit by rockets fired from the Gaza Strip have been killed in the violence. Israel has continued to drop bunker-busting bombs on around 35 smuggling tunnels under the Gaza-Egypt border in a bid to halt Hamas re-arming. Meanwhile, in Cairo, Mr Ban renewed his call for "an immediate and durable ceasefire"