The two sites' locations in the tribal areas had been shared with the Pakistani government this past week, the officials said Saturday. The Americans monitored the area with satellite and unmanned drones to see what would happen.
In each case, within a day or so after sharing the information, they watched the militants depart, taking any weapons or bomb-making materials with them, just as militants had done the first two times. Only then, did they watch the Pakistani military visit each site, when the terror suspects and their wares were long gone, the officials said, speaking on condition of anonymity to discuss matters of intelligence.
The Americans suspect that either lower-level Pakistani officials are directly tipping the militants off to the imminent raids, or the tips are coming through the local tribal elders that Pakistan insists on informing of the raids. U.S. officials have pushed for Pakistan to keep the location of such targets secret prior to the operations, but the Pakistanis say their troops cannot enter the lawless regions without giving the locals notice.
The latest incidents bring to a total of four bomb-making sites that the U.S. has shared with Pakistan only to have the terrorist suspects flee before the Pakistani military arrive. Both sides are attempting to mend relations and rebuild trust after the U.S. raid on May 2 that killed Osama bin Laden in Abbottabad, a Pakistani army town only 35 miles from the capital Islamabad.
The Pakistanis believe the Americans violated their sovereignty by keeping them in the dark about the raid. American officials believe bin Laden's location proves that some elements of the Pakistani army or Pakistan's Inter-Services Intelligence agency, or ISI, helped hide the al-Qaida mastermind.
"They are playing this very dangerous game ... by having elements of the ISI sympathetic to the Taliban and al-Qaida," said House Intelligence committee chairman Mike Rogers, R-Mich., speaking on CBS' "Face the Nation."
Rogers said Pakistan's failure to apprehend the militants running the bomb-making factories "sends the wrong message" at a time Congress is considering reducing some $1.5 billion in annual aid to Pakistan in retaliation after the recent series of such disagreements.
Sen. John McCain, R-Ariz., agreed with the notion of benchmarks. "After all, the United States is investing billions and billions of dollars in Pakistan," McCain said on "This Week" on ABC. "Taxpayers have a right to have a return on that."
In response, Pakistan army spokesman Maj. Gen. Athar Abbas neither confirmed nor denied the new report that militants were tipped off, but he criticized U.S. officials for making such allegations anonymously.
"Why are these faceless U.S. officials speaking through the media?" Abbas said. "Why don't they come out in the open so that we can respond to them with clarity?"
Abbas said that these "so-called officials" should remember that roadside bombs manufactured by the militants have killed and wounded many Pakistani soldiers.
"Does it make sense to allow this `killer machine' to continue targeting our troops who are deployed all over the place?" he said.
Last week, Pakistan's army disputed earlier reports that its security forces had tipped off insurgents at bomb-making, calling the assertions of collusion with militants "totally false and malicious."
Pakistani army officials claimed Friday they had successfully raided two more sites, after finding nothing at the first two, but a Pakistani official reached Friday offered no details of what they found.
The official admitted that in each raid, however, the Pakistani security services notified the local elders who hold sway in the tribal regions. Speaking anonymously to discuss intelligence matters, the official said they would investigate U.S. charges that the militants had been tipped off.
Two U.S. officials said they were asking the Pakistanis to withhold such sensitive information from the elders, and even their lower ranks, to carry out their raids in secret, to prove they could be trusted to go after U.S. enemies.
At least two of the sites were run by the Haqqani network, which is part of the Taliban, closely allied with al-Qaida, and blamed for some of the deadliest attacks against U.S. troops and civilians in neighboring Afghanistan. Pakistan has long resisted attacking the Haqqani network, saying the group has never attacked the state of Pakistan.
The intelligence sharing was intended as a precursor to building a new joint intelligence team of CIA officers together with Pakistani intelligence agents. But U.S. officials say Pakistan has failed to quickly approve the visas needed, despite agreeing to form the team in May.
U.S. officials have also accused Pakistan of holding up to five Pakistani nationals accused of helping the CIA spy on the Abbottabad compound in advance of the bin Laden raid.
Pakistan's ambassador to the U.S., Husain Haqqani, confirmed Sunday that Pakistan had rounded up more than 30 people as part of the investigation. He said they were being questioned for information, not punished, but did not say what would happen to them if charged and found guilty of spying.
Speaking on ABC, Haqqani said if any among them were informants who worked for the CIA, "we will deal with them as we would deal with an offending intelligence service and we will resolve this to the satisfaction of our friends, as well as to our own laws."
The Pakistani government, according to the official reached earlier, views any citizen who worked with the U.S. to spy on the compound as having betrayed his or her country by failing to tip off the government that someone the Americans wanted was hiding there. The government's position, the official said, is that such a tip could have saved the Pakistani government the embarrassment of being surprised by the bin Laden raid.
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