UNITED NATIONS - UN Secretary-General Ban Ki-moon said Wednesday that the role of the UN humanitarian coordinator in Pakistan had been strengthened to deal with the "very serious crisis" resulting from the displacement of over 2 million people from the Swat region. "The U.N. has been focused on assisting the Government of Pakistan in addressaing the very serious crisis...," he said in response to a question at his monthly press conference. Hundreds of thousand of people, who escaped the anti-Taliban military offensive in May, have started to return their homes in the region and their rehabilitation is posing a huge problem, UN officials have said. In this regard, the UN chief said the coordinator's role had been strengthened, without specifying the steps taken to do so. Last week Wolfgang Herbinger, the acting UN Humanitarian Coordinator in Pakistan said with the onset of the monsoon season and the needs of the returnees remaining acute, this is a critical time for the complex humanitarian situation in Pakistan. Ban also said that the Pakistan government, under the leadership of President Asif Ali Zardari, was closely coordinating its actions with the U.S. government in fighting terrorism while the United Nations remained engaged in promoting political reconciliation among the concerned parties.