Another Guantanamo Bay prisoner has been released as part of the drawn-out U.S. effort to wind down and eventually close the detention center at the U.S. base in Cuba, officials said.

Younis Abdurrahman Chekkouri was sent to his native Morocco after more than 13 years in custody at Guantanamo. His release, which followed an intensive security review and notification of Congress as required by law, was the first from the prison since June.