CNN jumped the gun. The stories are now conflicting. CNN now says there is no arrest.
Authorities arrest suspect in Boston bombings, source says
From Tom Watkins, CNN updated 1:48 PM EDT, Wed April 17, 2013
(CNN) -- [Breaking news update at 1:47 p.m. Wednesday ]
An arrest has been made in the Boston bombings investigation based on two videos showing images of the suspect, a federal law enforcement source told CNN's Fran Townsend.
[Breaking news update at 1:28 p.m. Wednesday ]
Boston University graduate student Lingzu Lu has been identified by the school as the third person who died in Monday's bombings at the Boston Marathon.
[Original story, posted at 1:11 p.m. Wednesday]
(CNN) -- Investigators believe they have identified a suspect in the Boston Marathon bombings, a source who has been briefed on the investigation told CNN's John King exclusively.
The breakthrough came from analysis of video from a department store near the site of the second explosion. Video from a Boston television station also contributed to the progress, said the source, who declined to be more specific but called it a significant development.
Earlier, a federal law enforcement source with firsthand knowledge of the investigation told CNN that a lid to a pressure cooker thought to have been used in the bombings had been found on a roof of a building near the scene.