HYV activists had uploaded a picture of a Hindu god on a social media site, on which the student from another community allegedly posted derogatory comments, said Allahaganj police station in-charge Ashotosh Singh.
Infuriated over the incident, HYV activists caught hold of the student in a market and beat him up yesterday, Singh said, adding that the student has been arrested on the basis of an FIR filed in this connection today.
Investigations are on in the case, he said.