His urge has come in the backdrop of deadlock between India and Pakistan over later's National Security Advisor Sartaj Aziz meeting Hurriyat leaders on Sunday ahead of NSA level talk in New Delhi on Monday.
India said the NSA level talks cannot go on if Pakistan insisted on talking to Kashmiri separatists.
NSA level talk between India and Pakistan was planned in Ufa, Russia after meeting between Prime Minister Narendra Modi and Prime Minister Nawaz Sharif.
Ban Ki-moon expressed serious concern in the wake of reports that NSA level talk between two countries scheduled on 23 August were in jeopardy.
UN Spokesperson Eri Kaneko said that the UN chief would urge both governments to take steps to ensure protection of civilians.