 Complete the following phrase:  President Rajapaksa said that the supply of water was a non-negotiable fundamental human right. Additionally, a government spokesman said that utilities could not be used as bargaining tools by the rebels. The government deployed its army and air force for the offensive, attacking not only the region of Mavil Aru but also the LTTE positions in Batticaloa, and Vavuniya. Air Force planes attacked LTTE positions on 26 July, and ground troops began an operation to open the gate. The sluice gates were eventually reopened on 8 August, with conflicting reports as to who actually opened them. Initially, the SLMM claimed that they managed to persuade the LTTE to lift the waterway blockade conditionally. The LTTE claimed that it opened the sluice gates on humanitarian grounds, although this was disputed by military correspondents, who stated the water began flowing immediately after security forces carried out a precise bombing of the Mavil Aru anicut. Eventually, following heavy fighting, government troops gained full control of the Mavil Aru reservoir on 15 August. The consequences of the Operation Watershed were about 150 civilians killed and more than 50,000 refugees from Mutur and the villages nearby. It was the precedent of the 