Gauhati, India (AP) Authorities don't see a connection between last week's Mumbai attacks and today's explosion on a passenger train in northeast India.
At least three people were killed and about 30 injured when a bomb that was left in a bag on the train exploded.
An ethnic insurgent group is suspected in the attack.
Several insurgent groups are battling for power, for ethnic pride and for control of drug routes in northeast India. The region is an isolated collection of seven states and hundreds of ethnic groups and subgroups.