"There is clear and proven involvement of the minister in the Garden Reach violence as is evident from TV footage," Front chairman Biman Bose said after a Left Front meeting.
"The minister should be immediately removed from the state cabinet in the interest of the inquiry," he said.
He alleged that the Trinamool Congress student wing triggered the violence at Garden Reach on February 12.
Front constituents have also criticised the state government for allegedly "misusing" the police and "false campaigns" against the 48-hour nationwide strike called by central trade unions, he said.