Julio Cesar Chavez Jr., a Mexican boxer who fought Jake Paul in a losing effort Saturday, was arrested Wednesday by Immigration and Customs Enforcement agents and is being processed for “expedited removal” from the United States, the Department of Homeland Security said in a release Thursday.

Chavez Jr. “has an active arrest warrant in Mexico for his involvement in organized crime and trafficking firearms, ammunition, and explosives,” according to the release.

DHS alleged that it believes Chavez Jr. is an “affiliate of the Sinaloa Cartel” — which President Donald Trump’s administration designated as a “Foreign Terrorist Organization.”

Chavez Jr.’s manager, Sean Gibbons, told the Los Angeles Times they were “working on a few issues.”

Paul defeated Chavez Jr. by unanimous decision Saturday.

More to come on this developing story