NEW YORK (Reuters) - The accused Mexican kingpin Ismael "El Mayo" Zambada pleaded not guilty to drug trafficking charges on Friday in the same New York courthouse where fellow Sinaloa cartel co-founder Joaquin "El Chapo" Guzman was convicted five years earlier.
Zambada entered the plea to the 17 felony counts he faces, which also include money laundering and weapons charges, at a hearing before US Magistrate Judge James Cho in Brooklyn.
Cho ordered that Zambada, 76, be jailed pending trial.
Prosecutor Francisco Navarro called Zambada "one of the most, if not the most, powerful narcotics kingpins in the world."
"A United States jail cell is the only thing that will prevent the defendant from committing further crimes and ensure his return to court," Navarro told the hearing.
Defense lawyer Frank Perez did not object to the prosecutors' request to jail Zambada.
Wearing a gray short-sleeved shirt, Zambada did not speak other than to answer "yes" or "no" to the judge's questions through an interpreter.
Zambada was taken into custody on July 25 at a New Mexico airfield, along with one of Guzman's sons, Joaquin Guzman Lopez, in a major coup for US law enforcement.
He was then taken to El Paso, Texas, where he pleaded not guilty in federal court to separate drug trafficking charges.
US District Judge Kathleen Cardone last week had him transferred to Brooklyn after the US Department of Justice asked that he face trial there first.
The Brooklyn case began in 2009 and includes allegations related to the trafficking of fentanyl, a synthetic opioid fueling an epidemic in the United States.
Zambada is next due in court on Oct. 31.
"El Chapo" Guzman is serving a life sentence at a maximum security prison in Colorado. His son has pleaded not guilty to drug trafficking charges in Chicago.
Shootouts this week in the western Mexican state of Sinaloa kindled fears that an intra-cartel war is about to break out in the wake of Zambada's arrest.
Fighting has killed 12 people since Monday, and on Thursday state authorities canceled National Day celebrations and shut schools in response to the escalating violence.