Prime Minister Narendra Modi of India called the shooting, the worst against civilians in the region for years, a “terror attack” and vowed to bring the perpetrators to justice.

Visitors were snapping photos and riding ponies when assailants emerged from a nearby forest and fired indiscriminately, local reports said.

Suspected militants opened fire in a popular tourist valley in the Indian-administered Kashmir, in one of the worst attacks on civilians in recent years, according to government officials.