Prime Minister Manmohan Singh arrived in Assam on Tuesday to review the security scenario in the violence-hit Assam districts of Dibrugarh and Tinsukia.

Soon after his arrival at the Mohanbari airport on Tuesday morning, the prime minister was closeted in a closed-door meeting with Chief Minister Tarun Gogoi, some of his senior Cabinet colleagues, senior civil and police officials and senior army officials at the airport.

Official sources said that the prime minister was also scheduled to review the Unified Command Structure in the state, which will henceforth be headed by the chief minister and not the chief secretary.

Dr Singh, after the meeting, would leave by helicopter to visit the violence-affected people of Mussaldhara Chapori at Sadiya in Tinsukia district and Moran in Dibrugarh.

On his return to the airport, Dr Singh will address a press conference before leaving for New Delhi.

United Liberation Front of Asom-triggered violence in the Upper Assam districts of Tinsukia, Dibrugarh and Sibsagar has claimed 70 lives since January 5.