Authorities in Indian-controlled Kashmir have temporarily shuttered more than half of the tourist resorts in the scenic Himalayan region following a deadly attack on tourists.

More than half of the tourist destinations in India's insurgency-torn Kashmir region have been closed to the public from Tuesday, according to a government order reviewed by Reuters, in a bid to tighten security after last week's attack on holiday-makers.

India's Prime Minister Narendra Modi says the gunmen behind a terrorist attack on tourists in the Kashmir region "will not be spared!"