In a written reply to a question in Lok Sabha, Minister of state for Home Ajay Maken said there has been an increased level of naxal violence in various states of the country.

"There has been increased level of naxal violence especially in Chhattisgarh, Jharkhand, Bihar, Orissa, Maharashtra and West Bengal," Maken said.

He said a total of 107 naxalites were killed and 861 naxals were arrested during the same period. Replying to a question if the Centre has urged States to deploy their own security forces to control violence in various parts of the country including Lalgarh in West Bengal, Maken said concerned states take appropriate action to deal with left wing extremism issues in the state.

He said the Centre supplements their efforts in several way and listed deployment of Central Paramilitary Forces, CoBRA battalion, setting of Counter insurgency and Anti Terrorism schools, modernisation and upgradation of state police and intelligence sharing among others.

Maken also listed reimbursement of security-related expenditure, filling up of critical infrastructure gaps under the scheme of Special Infrastructure in Left wing extremism affected states, assistance in community policing and civil actions besides other steps as assistance being provided to states.

He also said the internal security situation in the country remains largely under control. "No major terrorist incident has been reported in the hinterland during the current year. Similarly, no major communal incident has been reported in the current year. In overall terms, the security situation in Jammu and Kashmir has shown perceptible improvement. The security situation in Assam, Manipur an Nagaland continues to be a matter of concern whereas, Sikkim and Mizoram have remained peaceful. The situation in Tripura has improved significantly over the years. Barring sporadic violence in Meghalaya and Arunachal Pradesh, the situation has remained peaceful," he said.

He also said "the National Investigation Agency has been constituted under the National Investigation Agency Act, 2008 to investigate and prosecute offences under the Acts mentioned in the schedule, which, inter-alia, includes the Unlawful Activities (Prevention) Act, 1967, as amended in 2008".