The UN commission probing the assassination of former Pakistani premier Benazir Bhutto has sought access to former military ruler Pervez Musharraf, army chief General Ashfaq Parvez Kayani, the ISI chief and other senior military officers for questioning. The head of UN commission conveyed this request in a formal letter to the Pakistan government. The commission said, it would be willing to meet representatives of the army chief and the head of the Inter-Services Intelligence agency if they are unavailable. Under the terms of reference signed by the government and the UN commission, Pakistan is obliged to provide access to any official and individual and any material required for the probe. The terms of reference says, the commission will have free access to all places and establishments relevant to its work, freedom of access to all sources of information, including documentary material and physical evidence, and freedom to interview representatives of governmental and other institutions. Meanwhile, the UN commission has postponed its third visit to Pakistan for a few weeks, which was scheduled for the first week of November.<br/> <br/>