Sri Lanka, April 28 -- India said on Monday it had responded to 'unprovoked' firing from Pakistan along the de facto border for the fourth consecutive night, as it deepens its search for militants in the region following last week's deadly attack on tourists in Kashmir.

After the attack on 22 April that left 26 persons dead, India has identified two of the three suspected militants as Pakistani, although Islamabad has denied any role and called for a neutral probe.

The attack triggered outrage and grief in India, along with calls for action against Pakistan, which New Delhi accuses of funding and encouraging terrorism in Kashmir, a region both nations claim and have fought two wars over.

The nuclear-armed nations have unleashed a raft ...