WASHINGTON -- In another blow to Washington's relationship with Pakistan, U.S. officials say Pakistan failed another test to prove it could be trusted to go after American enemies on its soil by intentionally or inadvertently tipping off militants at two more bomb-building factories in its tribal areas, giving the suspected terrorists time to flee.
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.