The Indian military says Pakistani soldiers fired at Indian posts all along the highly militarized frontier in disputed Kashmir as tensions flare over attack on tourists.

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.

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.