This is interesting

U.S. Disavows 2 Drone Strikes Over Pakistan

“They were not ours,” said one of the officials, speaking on the condition of anonymity because of the drone program’s secrecy. “We haven’t had any kinetic activity since January.”

What exactly took place in those remote tribal villages, far from outside scrutiny, is unclear. But the Americans’ best guess is that one or possibly both of the strikes were carried out by the Pakistani military and falsely attributed to the C.I.A. to avoid criticism from the Pakistani public.

E-mail and phone messages seeking comment from the Pakistani military were not returned.

If the American version is true, it is a striking irony: In the early years of the drone campaign, the Pakistani Army falsely claimed responsibility for American drone strikes in an attempt to mask C.I.A. activities on its soil. Now, the Americans suggest, the Pakistani military may be using the same program to disguise its own operations.