Negotiations over water sharing have been ongoing since the 1980s, with both countries establishing temporary agreements, but a permanent resolution has remained elusive. The most significant step toward an agreement occurred in 2011, when a draft of the Teesta water-sharing treaty was prepared during then-Indian Prime Minister Manmohan Singh's visit to Dhaka. However, the deal was derailed by the opposition of West Bengal's Chief Minister, Mamata Banerjee, who cited concerns over water scarcity in her state.