Police in the eastern Indian state of Bihar say at least eight policemen have been killed in a landmine explosion in the district of Nawada.
They said that rebels from the outlawed Maoist Communist Centre were behind the attack.
Police said after the blast the rebels ran away with the weapons of the dead policemen.
Bihar has witnessed violent clashes between militias backed by rich landowners and landless peasants, the latter very often supported by the Maoists.
From the newsroom of the BBC World Service