US authorities will exhaust every avenue in identifying the two suspects, one of whom was seen dropping the bomb near Boylston Street, but will not rush the process.
The Department of Homeland Security have declared that tracking down the perpetrators of Monday’s Boston marathon bombing will not play out like “an episode of NCIS”.
At a much-awaited press conference yesterday evening, the FBI appealed for public assistance in helping to identify the two suspects, believed to be responsible for the tragedy.
Homeland Security Secretary Janet Napolitano told a congressional committee later that day that the two individuals are “persons of interest” and they will exhaust every avenue in identifying them.
Ms Napolitano said: “The investigation is proceeding apace. This is not an NCIS episode. Sometimes you have to take time to properly put the chain together to identify the perpetrators, but everybody’s committed to seeing that that gets done in the right way.”
Speculation is rife that those responsible for killing three people and injuring nearly 200 as a result of the pressure cooker bombs was a domestic terrorist attack, she would not be drawn on the issue.
“Right now, we can’t say one way or the other,” she added.
At a press conference yesterday where the FBI showed footage of the two bombing suspects, Richard DesLauriers, the U.S. Federal Bureau of Investigation's special agent in charge in Boston, said: "Today we are enlisting the public's help to identify the two suspects."
Both men carried backpacks that were believed to contain the bombs. The man identified as suspect No. 1 wore a dark baseball cap. Suspect No. 2 wore a white cap backwards and was seen setting down his backpack on the ground, DesLauriers said.
"Somebody out there knows these individuals as friends, neighbors, co-workers or family members of the suspects. Though it may be difficult, the nation is counting on those with information to come forward and provide it to us," he said.
By Caitlin McBride