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FBI investigators released photos & videos of two suspects in the Boston Marathon bombing investigation on Thursday.
FBI agents refer to the man in the dark hat as suspect #1, the man in the white hat is suspect #2.
The FBI is asking anyone with information to contact them directly at https://bostonmarathontips.fbi.gov/ or call 1-800-CALL-FBI (1-800-225-5324), prompt #3, with information.