A joint operation by the Andhra Pradesh and Tamil Nadu police is going on against suspected militants hiding in a house in Andhra Pradesh's Chittoor district, police said.
A Tamil Nadu police party had come under fire by the unidentified group Saturday morning when they were conducting a search operation in a residential area in Puttur town, which is 30 km from the famous temple town of Tirupati and close to Tamil Nadu.
A Tamil Nadu policeman was injured in the encounter while the police are reported to have recovered a gun and two bombs.
Policemen from both the states have surrounded the house where four to five alleged militants are believed to be holed up. According to local residents, the group had taken the house on rent about a month ago.
Senior police officials from both the states have reached the spot.
A police officer in Hyderabad said personnel from OCTOPUS, the anti-terror wing of the Andhra Pradesh Police, were being sent to Puttur.