The CPM members were sleeping at a place near a football ground, where a match was held last night, and they were attacked around 4.00 am by agroup of people allegedly belonging to IUML.
Seven persons are undergoing treatment at the Kozhikode Medical College Hospital here, four of them in a serious condition, while two others have been admitted to a hospital in Tanur in the district, they said.
Political rivalry was suspected to be behind the incident, police said.
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