Making his first public court appearance, Boston Marathon bombing suspect Dzhokhar Tsarnaev has plead not guilty to all counts, including using a weapon of mass destruction.

Boston Marathon bombing suspect Dzhokhar Tsarnaev has pleaded not guilty to 30 counts including use of a weapon of mass destruction to kill. He entered the plea today in federal court in Boston, saying, "Not guilty" in a Russian accent several times. Federal prosecutors are weighing whether to pursue the death penalty for the 19-year-old Tsarnaev.

Authorities say he and an older brother, Tamerlan, planted two bombs, which killed three people and wounded more than 260 at the April 15 marathon. The older brother was killed three days later following a shootout with police.

[Associated Press]