There's been further violence in the northeastern Indian state of Manipur ahead of this month's legislative assembly elections.

Separatist rebels threw a grenade at the chief minister's residence in the Manipur capital, Imphal but police say no-one was hurt.

In another incident, a group of drunken soldiers in the town of Moreh on the border with Burma fired at police bodyguards of a former speaker of the Indian parliament, Purno Sangma, injuring two guards.

Mr Sangma is campaigning for his Nationalist Congress party.

Meanwhile, three separatist groups have called for a boycott of the elections.

So far, one candidate in Manipur's assembly constituency of Tipaimukh has been killed.

The rebels say Manipur was forcibly incorporated into India fifty years ago.

From the newsroom of the BBC World Service