The chief federal prosecutor in Brooklyn went to Bogota Tuesday to announce the indictment of 17 leaders of Clan Usuga, described as Colombia's largest and most influential criminal gang, on cocaine trafficking and other charges.

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Acting U.S. Attorney Kelly Currie made the announcement at a joint news conference with U.S. Attorney Wilfredo Ferrer of Miami, whose office also filed indictments, and Colombian President Juan Manuel Santos.

The United States has announced a $5 million reward for the capture of one of the defendants, Dairo Antonio Usuga David, nicknamed Otoniel, who has been identified as the leader of the criminal group. One indictment alleges he headed a conspiracy to import 73 tons of cocaine into the United States.