UPDATE:

Three college friends of the surviving Boston Marathon bombing suspect are accused of removing a backpack from his dorm room — a backpack containing fireworks that had been emptied of gunpowder. According to charges filed today, they did so three days after the attack.

Two of the men are charged with conspiring to obstruct justice. A third is charged with making false statements. The affidavit says the two facing the obstruction of justice charges agreed to get rid of the backpack after concluding from news reports that their friend, Dzhokhar Tsarnaev, was one of the bombers.

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Boston police say three more suspects have been taken into custody in the marathon bombings.

In a tweet Wednesday morning, the police department says only that three more suspects are in custody and more details will follow. Police spokeswoman Cheryl Fiandaca confirmed the tweet but referred all other questions to the FBI.

Three people were killed and more than 260 injured on April 15 when two bombs exploded near the finish line.

Suspect Tamerlan Tsarnaev died after a gunfight with police several days later. His brother, Dzhokhar Tsarnaev, was captured and lies in a hospital prison.

Both are Russian natives who lived for several years in the U.S. They are accused of using a weapon of mass destruction.