The 1960 Indus Waters Treaty (IWT) survived two wars between the nuclear rivals and was seen as an example of trans-boundary water management. The suspension is among several steps India has taken against Pakistan, accusing it of backing cross-border terrorism - a charge Islamabad flatly denies. It has also hit back with reciprocal measures against Delhi, and said stopping water flow "will be considered as an Act of War".
The treaty allocated the three eastern rivers – the Ravi, Beas and Sutlej – of the Indus basin to India, while 80% of the three western ones – the Indus, Jhelum and Chenab – to Pakistan.
