Mexico has arrested some individuals involved in fentanyl production, and the government has seized several fentanyl laboratories.
Mexican President López Obrador has denied that Mexico produces the drug and accused U.S. authorities of espionage and spying following the unsealing of the indictments.
The Chapitos indictment and denial gives a new twist to the ongoing saga of the Sinaloa cartel.
And the broader crackdown on the production and distribution of fentanyl, is running into jurisdictional issues.