NEW DELHI — A popular Indian yoga guru fasted for a fourth day Sunday and threatened to expand his protest nationwide if the government doesn't act decisively to bring back billions of dollars of ill-gotten money that some Indians have allegedly stashed abroad. “If the prime minister fails to respond to my demand by Sunday evening, I will intensify the protest across the country in the form of a people's revolt,” Baba Ramdev told thousands of cheering supporters at a sprawling fairground in the capital. However, he put off announcing details of his plans, saying he was waiting for a response from Prime Minister Manmohan Singh. He said he would announce an action plan Monday. Ramdev and his supporters say they haven't eaten for three days to pressure the government to accept their anti-corruption demands, including the creation of a powerful ombudsman to check government officials, an independent Central Bureau of Investigation, and actions to prevent tax evasion and the illegal stashing of money in overseas banks. On Thursday, the government said a committee was working on a draft of an ombudsman bill that would be submitted to parliament next month. The finance ministry is in the process of tightening laws to curb illegal transfers of money abroad. Ramdev started his protest less than a week after anti-graft crusader Anna Hazare halted a separate hunger strike that failed to attract widespread support. Hazare and his backers said they would give up agitating and join politics instead. — AP