The Rashtriya Swayamsevak Sangh (RSS) activists staged a protest in Hyderabad on Friday against the attack on their office in Kerala.
A crude bomb was hurled at the RSS office in Kallachy near Nadapuram last night.
At least three RSS workers sustained injuries in the attack and were rushed to the Government Medical College in Kozhikode.
The attack took place hours after RSS leader Kundan Chandrawat triggered a political row for announcing a bounty of Rs. one crore on Kerala Chief Minister Pinarayi Vijayan's head.
"If anyone beheads the Kerala Chief Minister, who is the murderer of RSS activists, and brings his head I will give my property worth more than Rs. one crore to him," he said yesterday while addressing a public gathering in Ujjain, Madhya Pradesh.