Noorullah Noori, one of the five Guantanamo Bay detainees released on Saturday in the controversial exchange for Sgt. Bowe Begdahl, has vowed to return to Afghanistan and fight Americans, according to NBC News.

Noori was one of five high-level Guantanamo detainees who were released to Qatar, the Middle Eastern country where they’ll live for a year under terms of the agreement reached between the U.S. and the Taliban. The released Taliban commanders can’t exit Qatar for a year, and will have “restrictions on their movement and activities.” But they’ll be free to go where they please in Qatar, although they will be under the control of the Qatari government.

"After arriving in Qatar, Noorullah Noori kept insisting he would go to Afghanistan and fight American forces there,” a Taliban commander told NBC News on Friday.

One of Noori’s relatives said the freed Taliban commander decided he will go to Afghanistan after his year in Qatar is up. He made the decision after learning that the U.S. assured that no other country will arrest him and the four other detainees for a year as long as they lived in peace.

The relative said Noori and the other detainees -- Mohammad Fazl, Mohammed Nabi, Khairullah Khairkhwa and Abdul Haq -- were in bad health and were being treated in a Qatari hospital. He said their spirits were lifted after a statement from Taliban leader Mullah Mohammad Omar praised their release.

"The most important thing for them was the statement of Mullah Mohammad Omar and congratulations upon their release. Khairkhwa told me that like him, the remaining people forgot their years of imprisonment and ordeals after they came to know about Mullah Omar's statement," the relative said.