Israel has called for the immediate relocation of 1.1 million people in Gaza amid its massive bombardment in retaliation for Hamas's attacks, with the United Nations warning of "devastating" consequences. The evacuation order comes as Israel pounds the blockaded Gaza Strip with strikes and Palestinian militants fire rockets towards Israel. The war erupted on Saturday when Hamas militants crossed from Gaza and launched attacks on border communities, killing around 1,200 people. NDTV's Kadambini Sharma, reporting from Israel, says more and more troops and armoured vehicles and tanks are lined up at the border.