Akash and Rijin Raj, both in their thirties, went to the police station at Maloor, near Mattanoor, with a few other local CPI(M) workers and surrendered to the authorities, they said.
The development comes in the backdrop of the Congress sharpening its attack on the ruling CPI(M) over the killing of its functionary on February 13.
Congress Kannur strongman and former Lok Sabha member K Sudhakaran had announced a 48-hour fast in front of the Collectorate here from tomorrow as part of its agitation against the delay in arresting those behind the killing.
The Youth Congress leader was critically injured and died after being taken to the Indira Gandhi Co-Operative Hospital at Thalassery, the police said, adding that the condition of those injured was stable.
Police suspect the assault could be related to incidents of violence in the area last week.
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