Umar Farouk AbdulMutallab, dubbed the "underwear bomber" after he was convicted of trying to bring down an airliner with a bomb concealed in his undergarments, has been moved to the federal Bureau of Prison's "Supermax" facility in Colorado, the agency said Thursday.
Bureau of Prisons official Edmond Ross would not comment on why AbdulMutallab was moved from the U.S. Penitentiary inÂ Florence, Colorado, to the ultra-high-security Supermax facility in the same city.
AbdulMutallab, 25, pleaded guilty in October to attempted use of a weapon of mass destruction, among other charges, in trying to bring down a Northwest Airlines flight on Christmas Day 2009.
He was sentenced to life in prison in February.
U.S. officials say the terror group al Qaeda in the Arabian Peninsula helped plot the bombing attempt on Northwest Airlines Flight 253, which was heading from the Netherlands to Detroit. Authorities say AbdulMutallab, a passenger, tried to ignite a bomb that was hidden in his underwear shortly before the plane landed, but passengers and flight crew members subdued him and extinguished flames that erupted whenÂ the device briefly set his clothingÂ on fire.
The plane was carrying 289 people.
"As this investigation and prosecution have shown, Umar Farouk AbdulMutallab is a remorseless terrorist who believes it is his duty to kill Americans," U.S. Attorney General Eric Holder said in a Justice Department news release after the sentencing.
At the Supermax facility,Â AbdulMutallab joins Ramzi Yousef, leader of the 1993 World Trade Center bombing, so-called "shoe bomber" Richard Reid, Atlanta Olympic Park bomber Eric Rudolph and "Unabomber" TedÂ Kaczynski among an inmate population of more than 450.