Washington-area sniper John Allen Muhammad was executed Tuesday by lethal injection, a Virginia prisons spokesman said.
He was declared dead at 9:11 p.m., said Larry Traylor, director of communications for the Virginia Department of Corrections.
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During three weeks in October 2002, Muhammad and accomplice Lee Boyd Malvo, then 17, killed 10 people and wounded three, while taunting police with written messages and phoned-in threats and demands.