Rapper and activist Mos Def, now known as Yasiin Bey, has been denied re-entry into the United States according to multiple media sources. Bey has been an outspoken critic of not only the Obama administration but also of America and now resides in South Africa. This has now caused the rapper to cancel his upcoming U.S. tour.

According to the Together Boston Music Festival, “We regret to inform you that due to immigration [and] legal issues Yasiin Bey is unable to enter back into the United States and his upcoming U.S. tour has been canceled, including May 15, Together Boston’s show at The Wilbur Theatre. Individual ticket refunds for this show are available at point of sale.”

Bey has been outspoken about U.S. treatment of Muslim prisoners at the Guantanamo Bay detention facility. In July of 2013, Bey took part in a simulation of “force-feeding” that is similar to what allegedly occurs at Guantanamo Bay.

Bey was born in Brooklyn, New York, on Dec. 11, 1973, so he is an American citizen. The current reason that Bey is being denied entry is not fully known.

See the video of Bey being force-fed below: (Warning: Graphic)