Police in India's restive northeast, where at least 73 people have been killed in a recent wave of violence, have arrested three suspected militants.

Local officials say the arrests were made Wednesday night in Guwahati, the capital of Assam state. They say the three belong to the United Liberation Front of Asom, an outlawed group that has been fighting for an independent homeland since 1979.

Federal Home Minister Shivraj Patil approved sending thousands of additional troops to the area to help quell the violence. Indian border security guards in the northeastern region have already stepped up patrolling to prevent infiltration of militants.

Indian Prime Minister Manmohan Singh said Wednesday Bangladesh has been a shelter for Indian separatist groups that want independence in northeastern India. However, Bangladesh denies the accusations.