By Justin Sink - 05/01/13 05:07 PM EDT
"It is part of the ongoing investigation. And this basically is I believe going to involve three students who allegedly helped to dispose of evidence or remove evidence," King said on Wednesday. "Two of them had been in custody on visa violations and the other was an American citizen who has been picked up."
CNN also reported that two of the suspects are foreign students from Kazakhstan who were believed to be roommates of Dzokhar Tsarnev, the 19-year-old bombing suspect who was captured after a day-long manhunt that shut down the city of Boston. The network said that the students were suspected of lying to investigators and throwing potential evidence into a dumpster.
Tsarnaev is facing federal charges of using a weapon of mass destruction and malicious destruction of property resulting in death. He was moved late last week from a hospital to a federal prison medical center, where he is reportedly being kept in a room behind a steel door.
His brother, Tamerlan Tsarnaev, died after a shootout with police. The pair are accused of having set the twin bombs that killed three people and injured some 260 others at the Boston Marathon.
Multiple media outlets are reporting that the suspects detained Wednesday are not believed to have aided the Tsarnaevs before the terror attack.
Earlier this week, investigators searched the Rhode Island home of Katherine Russell, Tamerlan's widow and the mother of his child. Boston police had also searched a landfill in New Bedford, Mass., in search of a laptop that could be relevant to the case. But CNN reported that Russell was not among those arrested Wednesday.
Boston Police said they did not have details on a possible press conference to explain the arrest, and referred questions to the FBI.
The arrests come as Washington begins to delve into possible intelligence failures in the run-up to the Boston attack. The House Homeland Security Committee is scheduled to hold the first congressional hearing into the Boston bombings next week.
For more on the arrests, click here.