Indian Prime Minister Manmohan Singh has warned of possible terrorist attacks against economic, religious and nuclear sites in his country.
Mr. Singh issued the warning Tuesday in New Delhi at a conference attended by top security officials and chief ministers of states.
He said suicide attacks inside India are possible, and he added that intelligence agencies suggest there are terrorist "sleeper cells" in some urban areas.
Prime Minister Singh called for firm handling of rising violence in several eastern and southern states, where Maoist rebels have stepped up attacks.
He said the security situation in Indian Kashmir has improved, but that India must remain on guard. Muslim separatists have been waging a violent insurgency since 1989 in Kashmir.
He urged state officials to do more to improve security, saying that economic development is not possible without law and order.
Mr. Singh's warning came two months after train bombings in Mumbai killed nearly 200 people. India blamed the bombings on Islamic militants with links across the border in Pakistan. Pakistan has denied any involvement.
Information for this report is provided by AP and Reuters.