'There will be a mighty vengeance for this black day': Netanyahu pledges fierce response as Israel mobilizes tens of thousands of reservists before plotting huge ground operation in Gaza - after Hamas attacks left more than 300 dead

  Israel's prime minister Benjamin Netanyahu last night declared that Israel will take 'mighty vengeance for this black day' as warplanes launched a retaliatory strikes against Hamas. Airstrikes yesterday flattened several buildings in the centre of Gaza City, including an 11-storey building called Palestine Tower which houses Hamas radio stations on its rooftop. Seventeen Hamas compounds were also hit as dozens of fighter jets launched strikes against the terror group.