A courtroom sketch shows Dias Kadyrbayev, left, and Azamat Tazhayakov appearing in front of Federal Magistrate Marianne Bowler in Boston.

An FBI image shows fireworks tubes found in a backpack that was allegedly disposed of by friends of Dzhokhar Tsarnaev.

Azamat Tazhayakov, left, Dias Kadyrbayev, center, and a third person face charges of conspiring to obstruct justice and making false statements after allegedly helping bomb suspect Dzhokhar Tsarnaev, right, after the attacks.

Robel Phillipos, seen in a photo taken from a video on YouTube.

Robert G. Stahl, left, lawyer for Dias Kadyrbayev, and Harlan J. Protass, lawyer for Azamat Tazhayakov, spoke with the media after leaving the federal courthouse.

Derege B. Demissie is attorney for Robel Phillipos.

The scene outside the courthouse.

Officers stood outside the Moakley courthouse in South Boston before the suspects were brought to court.