MLA Gulshan Mullick was going along with his guard to Pachda area when stones and bombs were hurled on him, police said.
The MLA has alleged that the attackers were activists of CPI(M) and Congress. Both the parties have, however, denied the charges.
Mullick later on filed an FIR at the local police station.
To prevent escalation of violence in the area, RAF have been deployed in the area.