A gang leader was hacked to death allegedly by members of a rival group at Athani near Aluva here on Sunday night, police said.
Police identified the deceased as Binoy, 34, an accused in several criminal cases.
Five members of a rival gang have been arrested in connection with the killing.
A special team headed by Ernakulam Rural S P K Karthik is looking for three others in the case, police said.
Attack on one of them by a member of Binoys gang is said to be the reason for his killing, they said.
When the gangsters came to know that Binoy was standing in front of a hotel, they reached the spot and attacked him.
Police said CCTV footage collected from a nearby building captured the incident.
Visuals aired by local television channels on Monday showed Binoy being attacked by three people using sharp-edged weapons on the highway at around 8 pm on Sunday.
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