A country made bomb was hurled at two Communist Party of India-Marxist (CPI-M) cadres in Koothparambu district in Kannur yesterday.
The bomb was thrown at them when they were on a bike. The culprits are hitherto unidentified.
The CPM, however, blamed Rashtriya Swayamsevak Sangh (RSS) workers for this incident.
In another incident, a RSS worker was injured after a clash erupted between CPI (M) and BJP workers in Koothparambu. Police are saying that the injury is not serious.