Suspected militants attacked Uttar Borbeel police outpost in Assam's Karbi Anglong district, police sources said.
The insurgents fired 40 rounds from atop the hills on the outpost, under Bokolia police station, around 10 PM last night.
The police retaliated by firing 18 rounds, they said.
None was injured in the exchange of fire. Today, the army and the police jointly launched a search for the culprits, the sources said.
