The EC has deployed 580 companies of central forces to man over 98 per cent of the polling booths in these constituencies to ensure free and fair polling.
With a substantially weakened Left Front and the Congress, political observers say the anti-Trinamool vote will go to the BJP.
Seventy-one parliamentary constituencies spread across nine states voted in the fourth phase of Lok Sabha elections.
Six persons, including a woman, were killed and 18 were injured in violence and CRPF firing in the fourth phase of the West Bengal panchayat elections on Monday. Polling in four districts saw a voter turnout of 25 per cent.
Sporadic violence marked the third phase of panchayat elections in West Bengal on Friday covering three districts of Howrah, North 24-Parganas and South 24-Parganas where an average 25 per cent polling was recorded in the first four hours of voting.