Can India really stop river water from flowing into Pakistan?
There's a bigger picture: India is downstream of China in the Brahmaputra basin, and the Indus originates in Tibet.
In 2016, after India warned that "blood and water cannot flow together" following a militant attack in Indian-administered Kashmir which India blamed on Pakistan, China blocked a tributary of the Yarlung Tsangpo - that becomes the Brahmaputra in northeast India.
China, that has Pakistan as its ally, said they had done it as it was needed for a hydropower project they were building near the border. But the timing of the move was seen as Beijing coming in to help Islamabad.
After building several hydropower plants in Tibet, China has green-lit what will be the world's largest dam on the lower reaches of Yarlung Tsangpo.
After a deadly militant attack in Kashmir, India suspended a key water treaty with neighbouring Pakistan.
www.bbc.com
Pakistan should absolutely approach China as plan B.