A powerful earthquake struck off the city of Padang on Indonesias Sumatra island on Wednesday,killing at least 75 people and trapping thousands under rubble,officials said. The death toll was likely to rise as many buildings in the city of 9,00,000 people had collapsed,Vice-President Jusuf Kalla said in Jakarta. We have received a report from the mayor of Padang that the death toll is 75. But many people are trapped in collapsed shops,building and hotels, Kalla said. TV footage showed devastation,with piles of rubble and smashed houses after the 7.9 magnitude earthquake,which caused widespread panic across the city.