Federal officials leading the probe into the Boston Marathon bombings have released photos and a video showing the men near the site of the explosions.
Richard DesLauriers, the special agent in charge of the Federal Bureau of Investigation's Boston office, said he considered the two suspects “armed and extremely dangerous” and asked the public to pass on any tips to law enforcement officials.
The first suspect was observed wearing a black cap, while the second one was seen wearing a white cap, Mr DesLauriers said. Both appeared to be carrying bags on their backs. According to the FBI, the second suspect placed his bag at the site of the second of the two blasts that struck the marathon on Monday.
The explosions killed three people and wounded more than 170 near the marathon's finish line on Boston's Boylston Street. The youngest fatality was 8-year old Martin Richard from the nearby community of Dorchester. 29-year old Kyrstle Campbell and 23-year old Lu Lingzi, a Boston University graduate student from China, were also killed by the blasts.
“Today we are enlisting the public's help to identify the two suspects... Somebody out there knows these individuals,” Mr DesLauriers said.
The developments came just hours after President Obama and first lady Michelle Obama attended a special service for the victims at Boston's Cathedral of the Holy Cross.