Reddit says that, but Reddit will not give their names etc because of privacy. I don’t know what to think, but NY Post released the photos that they said LE gave them. Of course, NYP also said 12 people died in the blasts.
No, the New York Post printed the photos they said that the newspaper had obtained from an email (which they described as one circulating among law enforcement types) that was sent to them. As to who, exactly, sent the email (and photos) to the Post, the newspaper story doesn't say.
But note that the Post story never does say anything along the lines of: "Law enforcement authorities sent us these pictures and told us that these are the guys they're looking for."
My guess it that the Post has cocked it up, blithely running a "too-good-to-check" story this morning that had already been overtaken by events.