A Pattali Makkal Katchi (PMK) functionary A. Thirumalaivasan (36) of Chinnakallipattu was hacked to death by an eight-member gang near the Vazhudareddi Regional Transport Office here on Friday.
Police have arrested seven persons, including S. Arumugham, deputy secretary of the State youth wing of the Tamizhaga Vazhvurimai Katchi.