NEW DELHI – Indian authorities severed mobile internet access and text messaging for a second day Sunday across Punjab, a state of about 27 million people, as officials carried out a dramatic manhunt to capture a Sikh separatist and braced for potential unrest. In a bid to forestall unrest and curtail what it called “fake news,” Punjab authorities blocked mobile internet service beginning at noon Saturday, shortly after they failed to apprehend Singh as he drove through central Punjab with a cavalcade of supporters. At a time when the government is pushing its citizens to pay for goods and receive welfare services online, such widespread internet shutdowns threatened to undermine the government’s own efforts, Sugathan said