FILE - This file photo provided Friday, April 19, 2013 by the Federal Bureau of Investigation shows Boston Marathon bombing suspect Dzhokhar Tsarnaev. Azamat Tazhayakov, a friend of Tsarnaev, is on trial on obstruction of justice charges, accused with another friend of removing items from Tsarnaev's dorm room. He is not charged with participating in the bombing or knowing about it in advance. (AP Photo/FBI, File)
Dzhokhar Tsarnaev.
AP/FBI

Lawyers for Dzhokhar Tsarnaev are asking a federal judge to dismiss the indictment against the alleged Boston Marathon bomber, pointing to concerns over the selection of his grand jury, The Boston Globe reports.

Prosecutors have not yet replied to the motion, according to the Globe:

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In a 15-page motion filed this afternoon, defense attorneys identified several concerns over the manner in which grand juries have been picked at the courthouse over the past three years, including the fact that African-Americans and the elderly have been underrepresented in the selection process.

If convicted in Boston, Tsarnaev could face the death penalty.