PALAKKAD: An activist of the DYFI was hacked at Cherupulasseri in Palakkad. The person injured has been identified as Shabeer Ali of at Cherupulasseri. A group who came in bikes wearing masks barged into his house and hacked him. The incident happened last night. The police has not confirmed whether the attack was part of the disputes in connection with the hartal. 509 persons have so far been arrested in the district. A tense situation is still prevailing in the district.