Three members of the defense team of the accused Boston Marathon bomber falsely identified themselves as FBI agents and tourists when they were in Russia investigating the case, said prosecutors Friday.

Dzhokhar Tsarnaev, 21, is facing a possible death penalty in Boston for detonating bombs at the Boston Marathon which killed three people and wounded over 260.

“While conducting interviews in Russia, the members of the defense team reportedly refused to produce documents confirming their legal status and identified themselves as employees of the FBI. As a result, the Russian government…expelled them,” wrote the prosecutors, according to The Boston Globe.

A lawyer of Tsarnaev, Miriam Conrad, declined to give details about the case Friday but did say, “We don’t agree with the [Russian] government’s characterization of what happened and we’ll be responding further at an appropriate time, in writing or in court.”

The defense team of Tsarnaev also told officials the purpose of their visit was tourism.

The defense team members have not been identified.

The brother of Dzhokhar, Tamerlan, was also suspected of being involved in the bombings. He was killed in a confrontation with police several days after the bombings.

The jury selection process for the trial of Tsarnaev was agreed on separately on Friday. Gerald T. Leone Jr., a former state and federal prosecutor and now a law partner at Nixon Peabody, told The Boston Globe that the jury selections for such cases are difficult.

“One of the hardest things to do is to ferret out when somebody wants too badly to be on a jury. You do need to consider [potential jurors who] want to serve for the wrong reasons,” Leone said.

The trial is slated for November. It will not be televised because it is a federal trial.