Since Saturday night, bombs were being hurled from Khejuri towards Nandigram and gunshots were heard in Kedorabarchak area, a PTI correspondent said.
After the discovery of graves at Bidyapit village at Khejuri and Talpati canal, another grave was found on Monday near the former Bhumi Uchhed Pratirodh Committee stronghold of Maheshpur in Nandigram, the police said.
Three persons were killed in a bomb blast in Nandigram on Sunday when a bandh was being observed in the area at the call of the an organisation opposing land acquisition.
IGP (law and order) Raj Kanojia told PTI in Kolkata that the police inspector was critically injured when a bullet hit him on his head while he was on duty near Bhangabera, close to Sonachura.
The Bhumi Uchhed Pratirodh Committee's core committee member Sabuj Pradhan told reporters the body was found while the group's members were digging up land under Bhangabera bridge.
Sources said they would gherao the Block Development Officer's office and local police station on January 25 to protest the bombings and to demand a thorough inquiry into the violence on January seven in which six persons were killed.
The Bhangabera bridge on the border between Nandigram and Khejuri is where the first spark of violence erupted early January, leading to the divide between the Bhumi Uchhed Pratirodh Committee and the Communist Party of India-Marxist.
In West Bengal's political circles, it was widely believed that after Mamata Banerjee, Suvendu Adhikhari was perhaps the only leader with a truly significant mass base of his own.
'The life of his political career is dependent on success in this constituency.'
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.
A blood-soaked Nandigram made Mamata Banerjee what she is today and underpins the hopes of the combustible West Bengal leader of clinching a third straight term in office.
Laxman Chandra Seth, believed by the vast population of the area to have been the villain of the historic anti-farmland acquisition movement in 2007, said the two built their political careers by misleading the innocent people of Nandigram. Now their lies are back to haunt them.