A federal appeals court has refused to delay or move the trial of Boston Marathon bombing suspect Dzhokhar Tsarnaev (joh-HAHR' tsahr-NEYE'-ehv).

The 1st U.S. Circuit Court of Appeals in Boston issued its decision Saturday, saying defense attorneys haven't made "the extraordinary showing" required to justify a delay or change of venue.

The trial is scheduled to begin Monday in Boston.

Tsarnaev has pleaded not guilty to 30 charges connected to the April 2013 explosions that killed three people and wounded more than 260. If convicted, he could face the death penalty.

On Friday, the judge hearing his case said jury selection will start as scheduled because it would be inconvenient to delay it.

Tsarnaev's lawyers had asked the appeals court to delay the trial and move it out of Massachusetts.