AP Source: Tsarnaev Relatives Arrive In Boston During Penalty Phase

Several relatives of marathon bomber Dzhokhar Tsarnaev have arrived in Boston as the defense prepares to present its case in the penalty phase of his trial.

A law enforcement person told The Associated Press that relatives of Tsarnaev, who's originally from Russia, flew into Boston on Thursday. The source spoke on condition of anonymity because that person wasn't authorized to release the information.

The prosecution rested its case Thursday. Tsarnaev's lawyers are scheduled to begin presenting their witnesses Monday. Some of Tsarnaev's relatives may be called to the stand.

The same federal jury that convicted Tsarnaev earlier this month in the bombings is hearing evidence on whether he should be executed or spend the rest of his life in prison.

Three people were killed and more than 260 others were injured in the bombings.