FBI Special Agent Rick DesLauriers said on Tuesday that the investigation into the Boston Marathon blasts continues, but he added that "there are no known additional threats."
"We continue to interview various witnesses and process the crime scene," DesLauriers said at a press conference, according to a rush transcript. "Which could take some time. The citizens of Massachusetts and the city of Boston should expect to see the FBI and JTTF partners conducting investigative activity in the greater Boston area. Assistance from the public remains critical in establishing a timeline of events, which leads to swift conclusion through due diligence and strong investigative activity."