Pakistan told the United States to leave a remote desert air base reportedly used as a hub for covert CIA drone attacks, Defence Minister Ahmed Mukhtar was quoted by state media as saying Wednesday. His remarks are the latest indication of Pakistan attempting to limit US activities since a clandestine American military raid killed Osama bin Laden on May 2 and plunged ties between the anti-terror allies into chaos. "We have told them (US officials) to leave the air base," national news agency APP quoted Mukhtar as telling a group of journalists in his office. American drone attacks on Taliban and Al-Qaeda operatives in Pakistan's northwestern semi-autonomous tribal belt are hugely unpopular among a general public opposed to the government's alliance with Washington. CNN reported in April that US military personnel had left the base, said to be a key hub for American drone operations, in the fallout over public killings by a CIA contractor in Lahore and his subsequent detention. Reports said operations at the base, which Washington has not publicly acknowledged, were conducted with tacit Pakistani military consent.