Four RSS workers were attacked in Kerala's Kannur district on Monday.
The four injured have been given medical care and are being treated while the attackers are yet to be identified.
On Sunday, a CPI(M) worker was injured after a crude bomb was hurled at a rally.
The incident happened a day after Mayor V.K. Prasant was attacked by the BJP workers at the city corporation council.
Meanwhile, CPI(M) district secretary Anavoor Nagappan alleged that the BJP workers had unleashed violence on the workers of his party during a procession.
The BJP had on October 3 launched its 'Janaraksha Yatra' from Kannur to highlight 'Left's atrocities' in the state.
