The number of people killed by a bomb explosion which derailed a train in the Indian state of Jammu and Kashmir has risen to five.

The dead include a mother and baby.

The device went off in a carriage about half an hour after the train left Jammu city, bound for Calcutta.

The police suspect Muslim militants planted the bomb, but no group has so far said it carried out the attack.

From the newsroom of the BBC World Service