GUWAHATI, India - Suspected tribal guerrillas shot dead 11 people in the northeastern Indian state of Assam, police said Monday.

Four women and four children were among those killed in the attack late Sunday in a village in Sonitpur district, some 240 kilometres (149 miles) north of Assam's main city of Guwahati, a police spokesman said.

He blamed the killings on tribal guerrillas belonging to the outlawed National Democratic Front of Bodoland (NDFB), but did not say what might have motivated the attack.

Assam state's fishery minister, Nurzamal Sarkar, a Sonitpur legislator, said 15 people were injured in the raid, the second since June, when unidentified gunmen killed 12 people in the oil- and timber-rich state.

India blames the NDFB, which is fighting for an independent homeland for the Bodo tribe, for a string of bombings in Assam in October last year which claimed around 100 lives.

More than 10,000 people have died in insurgency-linked violence in Assam during the past two decades.