In yet another case of political violence in Kerala, bombs were hurled at Bharatiya Janata Party's offices on Wednesday.
The BJP has blamed the Communist Party of India (Marxist) (CPM) for the bomb attack on its panchayat office in Kannur.
The BJP and the CPI (M) have indulged in blame game for the killing of their party activists in the state.
BJP chief Amit Shah on Sunday protested against the alleged killings of his party activists in Kerala with a "Jan Raksha Yatra" (people's protection march) in New Delhi.
He had alleged that at least 120 BJP workers have been killed since the communists came to power in Kerala.
On Sunday, as many as 14 persons, including four police personnel, sustained injuries when some crude bombs were hurled around on a procession taken out by CPI(M) activists at Kaivellikal.
Two swords, seven iron rods and a knife were found near the district office of the BJP in Kannur, a media report said.