A ten-year-old boy was killed and five more people injured when suspected militants lobbed a grenade in a crowded market in Assam, police said.
"Militants riding a motorcycle threw a grenade as they drove through a busy market, killing one child and wounding five other people," senior police official Debajit Deuri told AFP.
The attack took place in the small town of Udalguri, 71 kilometres (44 miles) north of Guwahati.
There was no immediate claim of responsibility for the attack, but in the past police have blamed similar attacks on groups fighting for independent homelands for their tribal followers in the tea and oil-rich region of Assam.
More than 10,000 people have lost their lives to insurgency in the state during the past two decades.