BOSTON — A federal judge has granted a request from Boston Marathon bombing suspect Dzhokhar Tsarnaev for jury records for Massachusetts federal courts over the last three years.

Tsarnaev’s lawyers asked for the records to determine if a jury plan adopted in 2009 has corrected racial imbalances. The changes followed a court challenge from two black defendants who said black citizens were underrepresented because they lived in neighborhoods where courts often didn’t have current addresses for residents.

Prosecutors did not oppose the request.

Judge George O’Toole Jr. granted the request Thursday.

The names and addresses of people called for jury duty will not be provided to the defense.

Tsarnaev has pleaded not guilty to 30 federal charges related to the April 2013 bombings, which killed three and injured more than 260.

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