Prime Minister Narendra Modi is likely to take stock of the 56-year old Indus Water Treaty in New Delhi today. Sources said, top officials from various Ministries including External Affairs and Water Resources are expected to brief the Prime Minister on the pact.

The treaty signed in 1960 by then Prime Minister Jawaharlal Nehru and then Pakistan President Ayub Khan allocates 80 per cent of water from the six-river Indus water system to Pakistan. Beas, Ravi, Sutlej, Indus, Chenab and Jhelum form the Indus water system that flows from India to Pakistan.

The treaty, brokered by the World Bank, is often considered to be too one-sided and there has been growing clamour to relook at it. The pact has survived wars and phases of frosty ties between India and Pakistan.