Authorities in Indian-administered Kashmir have demolished the houses of at least 10 alleged militants and detained more people for questioning as investigations continue into last week's killings of 26 people.

India's External Affairs Ministry said the Indus Water Treaty will be suspended after an attack in Kashmir left over two dozen dead.

Hindu-majority India has been fighting an armed insurgency in Kashmir for decades, though in recent years the situation had improved. The picturesque region is claimed in full by both India and Pakistan but ruled only in part by the neighbours.