Arun, a first year degree student of philosophy, claimed he was dragged out from the class last evening and attacked by SFI activists as he was a member of Kerala Students Union, the students outfit of the Congress, police said.
Hailing from nearby Aryanad, he suffered injuries and is undergoing treatment at the state-run general hospital here.
Political differences had led to the attack on him.
A case was registered against a group of students under IPC Sections including 323 (voluntarily causing hurt) and 324 (voluntarily causing hurt by dangerous weapons or means) and a search was on to nab them, they said.
Meanwhile, Opposition leader Ramesh Chennithala hit out against the attack and demanded stern action against those behind it.
PTI