Sporadic violence marred the fourth phase of parliamentary elections in India today. Turbulent areas of Srinagar, the capital of Indian-controlled Jammu and Kashmir, had a restless start to the polls but voting picked up as calm was restored. Tear gas was fired at one group of protesters chanting slogans against the elections, while suspected rebels threw a petrol bomb at a polling booth in the state's capital though no damage was caused, a spokesman for the Central Reserve Police Force said. In violence-hit Nandigram, West Bengal, two workers from the ruling Communist Party of India - Marxist (CPI-M) were seriously injured when party activists and the opposition Trinamool Congress clashed this morning. In a separate incident 90 miles from Kolkatta, a CPI-M worker died after bombs were hurled at him. Incidents of bombing, ransacking and looting have also been reported from constituencies that went to the polls today. Two voters who were standing in a queue reportedly died of sunstroke in the same state. Another was killed in Rajasthan when paramilitary forces opened fire to prevent a mob from capturing a booth. Across the country, aerial patrolling was conducted in rebel-affected areas as the three previous phases had seen violent protests by Maoists. Security personnel were also patrolling waterways in boats.