Police said Mullick and three other party workers, including a security personnel were injured when they entered Gabberia village on foot.
The injured were rushed to a local hospital for treatment.
When contacted, Mullick said he was attacked with bombs and brickbats by CPI-M and Congress and his security personnel fired four rounds in defence.
The MLA said he was injured in his shoulder by a brickbat and a woman party worker was also wounded.
Mullick also filed an FIR with the police.
