Authorities arrested a suspect Wednesday in the fatal bombings at the Boston Marathon, a federal law enforcement source told CNN’s Fran Townsend.
Details about the suspect’s identity and motive were not immediately available. News of the arrest was first reported by CNN.
Investigators identified the suspect based on two videos taken before Monday’s attack, the federal law enforcement source told Townsend.
One of the videos was surveillance footage taken at the nearby Lord & Taylor department store, the other was shot by a Boston television station, a source who has has been briefed on the investigation exclusively told CNN’s John King.
The development came after a chaotic day in which investigators revealed more details about the makeup of the bombs and apparently unrelated scares over letters containing ricin gripped the nation’s capital.
The bombs exploded 12 seconds apart near the finish line of the Boston Marathon, killing three people and wounding about 180 others.
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