A blast took place inside the civil station near the court of the Judicial First Class Magistrate in Malappuram.
No one was injured in the incident.
The blast occurred in a car hired by the Homeo District Medical officer (DMO), which had been parked along with some other vehicles near the court.
“No one was injured,” District collector A Shainamol told PTI.
Bomb and dog squads are searching the place, police said.
Further details are awaited.