Kannur: A police official was suspended in connection with the attack on Chief Minister Ommen Chandy.
Sivadasan belonging to the Peravoor police station was suspended for dereliction of duty.
Meanwhile, two more CPI-M activists were arrested on Friday in connection with the incident.
Chandy sustained injuries on his forehead during the stone pelting on Sunday. He was also hit on the chest by a stone causing inflammation in the area.