Damaged vehicles burn after a bomb blast in Guwahati, the main city of India's troubled northeastern Assam state, October 30, 2008.[Utpal Baruah/Reuters]

An ambulance and a fire engine are set on fire by an angry crowd at a blast site in Guwahati, the main city of India's troubled northeastern Assam state, October 30, 2008.[Utpal Baruah/Reuters]

Local media said curfew was imposed in Guwahati after crowds angry at the blasts attacked police and set cars on fire.

India's junior home minister condemned the attacks and called for an immediate investigation.

Sri Prakash Jaiswal, Indian Junior Home Minister, said, "As far as the central government is concerned, we have provided paramilitary forces to the state government of Assam. We have said time and again to the state government that they have to be alert because there are organizations that carry out these terrorist attacks again and again. We hope that the Assam government seriously investigates the matter."

No one has claimed responsibility for the attacks.

Dozens of Islamist groups are active in India's northeast state, an isolated region wedged between Bangladesh, Bhutan, China and Myanmar.

(CCTV October 31, 2008)