Federal prosecutors have reiterated their opposition to moving the Boston Marathon bombing suspect's trial out of state and say in a court filing that jury selection should begin as planned on Monday.

Dzhokhar Tsarnaev's lawyers want a federal appeals court to overturn a judge's decision to keep the 21-year-old's trial in Boston. They argue Tsarnaev cannot receive a fair trial in the city's federal courthouse, which is just few miles from where the bombing occurred.

Tsarnaev's lawyers filed the appeal Wednesday after a U.S. District Court judge denied their change-of-venue request as well as a motion seeking a nine-month delay.

Prosecutors filed their response to the defense's appeal Thursday.

Tsarnaev has pleaded not guilty in the April 2013 bombing.