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.

Twenty-six men were killed and 17 were injured when suspected militants opened fire at tourists in India's Jammu and Kashmir territory, police said.

Pakistan called on Saturday for a "neutral" investigation into the killings of mostly Indian tourists in Kashmir that New Delhi has blamed on Islamabad, saying it was willing to cooperate and favoured peace.