Two people have been killed and five others injured in a grenade explosion in north-eastern Indian state of Assam, police say.
Rebels have been fighting Indian forces for more than two decades
The attack took place in the state's northern town of Duliajan. Three policemen were among those injured.
Police told the BBC that rebels aimed the grenade at a police roadblock.
The blast came after the Indian government suspended military operations against United Liberation Front of Assam (Ulfa) separatists.
Earlier Ulfa activists had thrown a grenade at the house of a former minister, but it did not explode, police said.
Ulfa is one of the most powerful separatist groups fighting Indian security forces in the north-east.
It has been fighting for an independent state for more than 25 years. Thousands of people have been killed in the violence.
The rebels had called for a suspension of Indian military action before holding any direct talks with officials from Delhi.
Federal Interior Secretary VK Duggal said the move to suspend military action from Monday was a "goodwill gesture".
"We expect the Ulfa to reciprocate in a similar manner", he said.
During the past week a series of bombing attacks in Assam has left 10 people dead and 50 wounded.
Correspondents say the Indian government's decision to halt military action for 10 days is seen as unusual move, at a time when it usually increases security in the north-east in advance of Independence Day celebrations.
Ulfa is holding peace negotiations with the Indian government through a committee of civil society leaders called the People's Consultative Group (PCG).