Spraying pesticides on his parched vegetables one street away from the Indus River, Pakistani farmer Homla Thakhur is worried about his future. The sun is at its peak, the river is running very low, and India has vowed to cut supplies upstream after a deadly militant attack in Kashmir.

India and Pakistan have intensified their hostilities over the hotly contested Kashmir region following a massacre of 26 mostly Indian tourists, which New Delhi linked to Pakistan. Pakistan denies it was behind Tuesday's attack by gunmen on a group of tourists in Kashmir.

Relations between India and Pakistan are cratering following a deadly militant attack in Indian-administered Kashmir that has sparked tit-for-tat reprisals and raised fears of another military escalation between the nuclear-armed rivals.