By Latinos Post Staff (staff@latinospost.com) | First Posted: Apr 18, 2013 09:25 PM EDT

On Thursday, FBI released several images of two men suspected of being involved in the Boston Marathon bombings on April 15. The photos, taken from surveillance video, show one of the men carrying a dark backpack and putting it down near the site of the second explosion. The FBI pleaded with the public to share any information it may have on the two men.

In a press conference Thursday evening, FBI special agent Richard DesLauriers said, "Today we are enlisting the public's help to identify the two suspects." According to the New York Times, the two men can be seen carrying backpacks minutes before the two explosions. Both men can be seen wearing baseball caps as they make their way down Boylston Street.

The suspects were located using surveillance images as well as images from smartphones and television crews filming the marathon, the NY Times reported. "Within the last day or so, through that careful process, we initially developed a single person of interest," DesLauriers said. "Not knowing if the individual was acting alone or in concert with others, we obviously worked with extreme purpose to make that determination."

News agencies first began reporting that police had possibly identified a suspect on Wednesday before it was known that two suspects were sought.

DesLauriers urged the public who may have seen the two men, or who knows who they are, to call 1-800-CALL-FBI(1-800-225-5324).

Two bombs exploded within seconds of each other at 2:50 p.m on Monday near the Boston Marathon finish line on Boylston Street. The twin explosions killed three people and injured more than 170 injured.

All three victims of the attacks have been identified. The first victim, eight-year-old Martin Richard was with his mother and sister cheering on his father at the race when he was killed. The second victim identified was Arlington, Mass. resident Krystle Campbell, 29. The final victim was Boston University graduate student and Chinese national, LU Lingzi, 23.

During an interfaith memorial service in Boston on Thursday, President Obama said that "the spirit of this city is undaunted, and the spirit of this country shall remain undimmed," the NY Times reported. Massachusetts Gov. Deval Patrick added, "we will have accountability without vengeance, vigilance without fear."