The United States is withdrawing some of its troops from Pakistan at the specific request of Islamabad.
The request came after a raid by US special forces killed al-Qaeda leader Osama Bin Laden in early May.
The US has more than 200 troops in Pakistan helping to train the army, though the BBC reports that there are said to be intelligence and special forces operating there.
A spokesman at the Pentagon said that the numbers to be withdrawn are quite small.
It is not clear whether any of the American intelligence and special operations forces that are said to be in Pakistan clandestinely are also being pulled out.