Pakistan's disgraced nuclear scientist A Q Khan has informed a court in Lahore that the government has placed a ban on water and medical supplies to him under the garb of a court order.Khan's counsel Syed Ali Zafar told a bench that though arguments in a case for easing restrictions on the scientist are going on, the government had barred Khan from going out of his residence even to visit his brother who is critically ill in a hospital.Zafar said Khan's relatives and friends too had been stopped from visiting him and the government, in an unprecedented move, had restricted the supply of water to his residence and stopped his doctor and medical staff from visiting him.The federal government has filed a petition in the Lahore High Court asking it to bar Khan from moving around freely, meeting people and giving interviews to the media in the interest of national security. Khan was placed under house arrest in early 2004 after he confessed to running a nuclear proliferation network on state-run television.