updated 04/18/2013 AT 5:00 PM ET
•originally published 04/18/2013 AT 5:45 PM ET
The FBI has released photos of two suspects in the Boston Marathon bombings and is asking for the public’s help in identifying them, zeroing in on the two men on surveillance-camera footage less than three days after the deadly attack.
FBI Agent Richard DesLauriers says the photos came from surveillance cameras, photos and other evidence near the explosion sites. One man is seen wearing a light-colored baseball cap, the other a dark cap. The man in the dark cap set down a backpack at the site of one of the blasts, DesLauriers said.
Within moments of the announcement, the FBI website crashed, perhaps because of a crush of visitors.