Following Tuesday's massacre of 26 mostly Indian tourists, hostilities have intensified between India and Pakistan over the hotly contested Kashmir region.

A day after the U.N. appealed for restraint following Tuesday's deadly attack in Indian-administered Kashmir, India reported an exchange of fire across the de facto border in the disputed region.

The April 22 attack in India's Jammu and Kashmir territory was the deadliest on civilians in nearly two decades in the country.But the area has long been a source of tension between India and Pakistan.