KABUL, Afghanistan – Afghanistan's president accused U.S. forces of capturing and holding Afghans in violation of an agreement to turn over that responsibility to his forces, complicating a new round of security talks between the two countries.

Hamid Karzai's statement late Sunday came just days after the beginning of negotiations on a bilateral security agreement that will govern the U.S. military presence in the country after the majority of troops draw down in 2014.

Karzai's critics say he frequently strikes populist, nationalist poses that give him leverage in talks with the Americans. Karzai, in turn, has said that he needs to protect Afghanistan's national interest in the face of a much stronger partner.