FBI releases photos of two suspects and asks for public's help in identifying and locating them. They caution that they should be considered armed and dangerous.
Photos are at FBI.gov
Tips can be submitted by calling 1-800-CALL-FBI or via the web site: bostonmarathontips.fbi.gov
Special Agent Richard Deslauriers said that the FBI had pursued thousands of leads and tips and working methodically had identified what they are calling Suspect 1 and Suspect 2. Suspect 2 set down a backpack at the site of the second explosion. Suspect 1 appears to have been with that person.
These images should be the only ones that the public should view as credible, said Deslauriers.