ICE officials were not immediately available for comment.
The rapper still faces deportation proceedings in federal immigration court, Kuck said.
“His case is not over by a long shot,” he added.
Abraham-Joseph was convicted on felony drug charges in Georgia in 2014, and was arrested as part of a targeted operation with the cooperation of local law enforcement, an ICE spokesman told Reuters when the rapper was taken into custody.
21 Savage was nominated for two Grammy Awards for the hit “Rockstar,” with Post Malone, including the coveted record of the year category, but was unable to attend the glitzy awards ceremony in Los Angeles on Sunday because he was being held in Georgia.
His Facebook page shows he has several concerts scheduled in the coming weeks.