ISLAMABAD (AP) -- The Taliban on Sunday freed a US citizen from an Afghan prison, weeks after they said they had reached an agreement with US envoys on a prisoner exchange as part of an effort to normalize relations. The deputy spokesperson for the Taliban Foreign Ministry, Zia Ahmad Takal, identified the man as Amir Amiri. Qatar facilitated Amiri's release in the latest diplomatic achievement resulting from its security partnership with the US that has secured the freedom of four other Americans from Taliban detention this year. The FBI and his family have said they believe he was taken by the Taliban, who have denied holding him. But Afghanistan remains a focus for Trump, who has said he wants to retake Bagram Air Base, a massive former US military facility, a demand rejected by senior Taliban officials.