The escalating conflict between India and Pakistan, two neighbors who have been rivals for decades, erupted in the early hours of Wednesday morning when New Delhi launched missiles across the border.

India fired missiles into Pakistani-controlled territory in several locations early Wednesday, killing at least 19 people including a child, in what Pakistan’s leader called an act of war. India said it struck infrastructure used by militants linked to last month’s massacre of tourists in the Indian-controlled portion of Kashmir.

Tensions have soared between the nuclear-armed neighbors over last month's militant attack on tourists in the Indian-controlled portion of Kashmir.