The Maoists barged into the Kudhwa police station late last night and detonated bombs made from two small cylinders damaging a room of the newly-constructed building, Superintendent of Police Daljit Singh said.
There was no major damage to the building as two bombs planted in other rooms failed to explode, he said, adding the explosives were later defused by the bomb disposal squad.
The Maoists attack on the police building coincided with the death anniversary of the Naxal leader Charu Majumdar.
Raids were being carried out to nab the ultras, the SP said.