Washington sniper John Allen Muhammad executed

This recent but undated photo from the Virginia Department of Corrections shows convicted sniper John Allen Muhammad. John Allen Muhammad, 48, is set to die by injection in a Virginia prison Nov. 10, 2009, seven years after he and his teenage accomplice terrorized the area in and around the nation's capital for three weeks. (AP Photo/Virginia Department of Corrections) NICAID:111868305

The mastermind of the 2002 sniper attacks that killed 10 in the Washington, D.C., region has been executed.

A prison spokesman says John Allen Muhammad died by injection at 9:11 p.m. EDT Tuesday (0211 GMT Wednesday) at Greensville Correctional Center.

Muhammad was executed for killing Dean Harold Meyers at a gas station during the spree that terrorized Maryland, Virginia and Washington, D.C., over a three-week period. His teenage accomplice, Lee Boyd Malvo, was sentenced to life in prison.

Prison spokesman Larry Traylor says Muhammad had no final words. He says he didn't hear him utter a word the entire time.