Banerjee, who is also Trinamool Youth Congress president, was slapped by a youth wearing a cap during a public meeting at Chandipur in East Midnapore district.
Chatterjee described the act as "cowardly" and said that the administration would act immediately.
"Already an arrest has been made," he said.
"I have asked the SP to conduct an inquiry and submit a report to the government. I also talked to Abhishek over phone. He told me that he had been slapped, received injury on his left eye and physically assaulted, but he never stopped addressing the gathering," Chatterjee said.
Speaking about the identity of the attacker, who moved towards Abhishek while taking snaps on his cell phone before slapping him, Chatterjee said that the police was also asked to inquire about his details and arrest all those involved in the incident.
Reacting to the incident, TMC leader and Rajya Sabha member Derek O' Brien said, "On the pretext of taking a picture he (Abhishek) was slapped. We are in the hurly-burly of politics. We will look into this and we will find out whether there is any outsider involved."
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