At least 13 people were killed when militants dressed in military fatigues opened random fire at a busy market in the Assamese town of Kokrajhar on Friday.
Reports said that attackers first hurled a grenade and then began to fire, killing not less than a dozen people and injuring 18 others in the town.
News agency IANS, have quoted Assam Police chief Mukesh Sahay as saying that security forces shot dead one of the attackers. He suspected National Democratic Front of Bodoland (Songbijit) for the attack.
Condemning the attack, Assam Chief Minister Sarbananda Sonowal said the state government is committed to the the protection of the people.
He also announced ex gratia of Rs.5 lakhs to be given to next of kin of people who died and Rs.1 lakhs for the injured.
The Centre is closely monitoring the situation. Home Minister Rajnath Singh spoke to Sonowal on phone.