RSS activists protest against attack on their office in Kerala. (Photo: ANI Twitter)

Kozhikode: A day after bomb was hurled at a Rashtriya Swayamsevak Sangh (RSS) office in Kallachy near Nadapuram, a Communist Party of India (Marxist) (CPM) office at Vishnumangalam was set on fire by unidentified people on Thursday night.

No casualty has been reported so far in the incident.

In the attack at RSS office, four workers were injured after some unknown persons hurled a crude bomb. The injured have been identified as Babu, Vineesh, Sudhir and Sunil, police said.

While Babu and Vineesh, who suffered severe injuries in the abdomen and legs, have been admitted to the Kozhikode Medical College Hospital (KMCH), the other two have been taken to a private hospital here, a senior police official said.

Investigation is underway to ascertain the motive behind the attack, he said.

The attack took place hours after an RSS functionary in Madhya Pradesh announced a Rs one crore bounty for beheading Kerala Chief Minister Pinarayi Vijayan.

Kundan Chandravat, 'Sah Prachar Pramukh' of RSS in Madhya Pradesh's Ujjain, announced the reward to avenge the killing of its workers in Kerala, allegedly by CPI-M workers.

"The Kerala Chief Minister is killing our RSS workers who want to take this country forward. I will pay Rs one crore to anyone who beheads him even if I have to sell my house," Chandravat was seen saying in a video, which has gone viral.

The RSS, however, distanced itself from Chandravat's remarks.