Continuing his campaign trail in Karnataka, Congress president Rahul Gandhi Monday intensified attack on Prime Minister Narendra Modi over rising fuel prices. "PM Modi rode to power on the promise of reducing fuel prices. He should explain to the people why fuel prices are rising and why is he unable to curtail them," Gandhi asked while addressing a gathering in Hoskote, Bengaluru Rural district. Protesting against the high petrol and fuel prices, Rahul Gandhi earlier in the day rode a bicycle as he led a march on the issue while campaigning in Karnataka's Kolar district. Gandhi, who resumed his poll campaign for the May 12 assembly polls, took out a protest march in Maluru in Kolar against rising petrol prices by riding a bicycle with other Congress workers walking or running behind him. The world over petrol prices were decreasing, but in India prices were still high, he lamented. Earlier in the day, former prime minister Manmohan Singh slammed the Narendra-Modi government over its "disastrous policies" and accused it of "peddling conspiracy theories" instead of adopting "prompt corrective action". While addressing the media in the Karnataka Congress headquarters in Bengaluru, Singh alleged that the PM was only "punishing" the people by levying excessive excise taxes. PM Modi also interacted with Karnataka BJP's Yuva Morcha workers via the Narendra Modi (NaMo) app earlier today. Meanwhile, BJP chief Amit Shah also addressed public meetings in four constituencies during the day. Read | LIVE in Karnataka: Congress carries out door-to-door campaigning in Hubli’s BJP-dominated areas