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  • Suspect 1
  • Suspect 2 close up
  • Suspects together
  • Suspect 2 close up
  • Suspect 1 (black hat in front), suspect 2 in white hat
  • Tamerlan Tsarnaev died in a shootout with police on the MIT campus. (Credit: CNN)
  • Suspect "2" wears a white hat
  • Suspect "1" wears a black hat
  • Suspect "1" wears a black hat
  • Suspect "2" wears a white hat
  • Suspect "1" wears a black hat
  • Suspect 1 (black hat in front), suspect 2 in white hat
  • Suspect "2" wears a white hat
  • Suspect "2" wears a white hat
  • Suspect "2" wears a white hat

The FBI released four new pictures early Friday of the two suspects investigators say are wanted for the Boston Marathon bombing that killed three on Monday.