Over 53 people have suffered injuries in the blast.
Hundreds of people set ablaze houses in Katramafi Barga village following rumours that a cow had been slaughtered.
Nandigram, 126 km south of Kolkata, is Suvendu Adhikari's bastion, where he has vowed to defeat Mamata Banerjee by 50,000 votes or quit politics.
The spectre of Singur and now its verdict is looming large on the future of many of Bengal's projects, especially the state government's industrial parks that are vacant. As many more episodes await, the question uppermost on everyone's minds is, how long will Singur haunt Bengal?
As the BJP snaps at its heels, can the Communists stay relevant in the electoral game?