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Boston Marathon bomber moved to highest-security prison in country

BOSTON -- Boston Marathon bomber Dzhokhar Tsarnaev is now detained in the highest-security prison in the country.

Tsarnaev was sentenced to death last month. He then was taken from Massachusetts to the U.S. Penitentiary in Florence, Colorado. A U.S. Bureau of Prisons spokesman said then Tsarnaev eventually will be moved to a Terre Haute, Indiana, prison where federal death row inmates are executed.

Boston bomber apologizes to victims during sentencing

The Bureau of Prisons website says Tsarnaev was moved this week to ADX Florence. The prison is known as the Supermax. It's in the same complex as the penitentiary and houses some of the country's most notorious criminals, including Sept. 11 conspirator Zacarias Moussaoui and Unabomber Ted Kaczynski.

The 2013 Boston Marathon bombings killed three people and wounded more than 260. Tsarnaev apologized at his sentencing.