Boston Marathon Bombing Suspect Pleads Not Guilty

BOSTON (AP) — 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 Wednesday in federal court in Boston.

For the first one, he leaned toward a microphone and said, "Not guilty," in a Russian accent. He then said not guilty repeatedly about a half-dozen more times.

His sister sobbed loudly as he left the courtroom. He looked over and made a kiss motion with his mouth to his family.

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.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

A man accused of carrying out the Boston Marathon bombings with his brother has arrived in a courtroom for his first public appearance since the deadly attack.

Dzhokhar Tsarnaev is being arraigned in federal court in Boston on 30 charges, including using a weapon of mass destruction to kill.

The April 15 attack killed three people and wounded more than 260. Authorities say the 19-year-old Tsarnaev orchestrated the attack along with his older brother, Tamerlan Tsarnaev, who died following a shootout with police three days after the bombing.

Dzhokhar Tsarnaev was arrested on April 19 when he was found hiding in a boat in a suburban backyard. His first court appearance took place at a hospital, where he was recovering from injuries suffered in the police shootout.