WASHINGTON (Agencies) - The Central Investigation Agency (CIA) has established its own spy network in Pakistan , a US newspaper has quoted an official, as saying. According to the US official, the CIA established its spy network in Pakistans tribal areas during the last two years. The CIA has refused to accept ISI cooperation after establishing the spy network. A summit of spymasters that was held this week eased tensions, but failed to resolve issues over US drone attacks and espionage, which have imperilled the vital relationship between the CIA and the Inter-Services Intelligence (ISI), a US official said. The US said that the CIA had established an information-gathering network in Pakistans tribal areas, and the ISI collaboration was no longer required to specify targets for drone strikes. ISI collaboration was no longer required to specify targets for conducting drone strikes. Now the CIA informers point out the target for pilotless aircraft, the paper said. It claimed that the talks between ISI Director General Ahmad Shuja Pasha and CIA Director General Leon Panetta had failed. According to the newspaper, the US authorities told Pakistan that neither drone strikes would be stopped nor an explanation would be given to the Asian nation for each attack. The US intelligence agency is willing to expand consultations with Pakistan over drone operations, American officials said following a meeting between CIA Director Leon Panetta and ISI chief Lieutenant-General Ahmed Shuja Pasha on Monday. But Pakistans demands for a drastic reduction in drone attacks are unacceptable, as are suggestions that the United States should return to a Bush-era policy, limiting the strikes to 'high-value militant targets, the officials said. Panetta has an obligation to protect the American people and he isnt going to call an end to any operations that support that objective, one American official said. US officials also worry that Islamabad has been slowing routine rotations of American personnel, including spies, diplomats and military trainers, which could become a serious drag on routine and secret US activities in the region. Despite public protestation by Islamabad over US drone strikes in tribal region, Pakistan hopes that the United States will move ahead with long-stalled plans to supply a fleet of the remotely piloted aircraft, according to a source familiar with its wish-list.