Ryan Wedding, a former Canadian Olympic snowboarder and one of the FBI’s ten most wanted fugitives, has been arrested and charged with running a transnational drug trafficking operation, US media report.
The reported arrest ends a years-long search for Wedding, 44, who was wanted on drug and murder charges.
US officials have said they believe Wedding was living in Mexico under the Sinaloa drug cartel’s protection.
The FBI is expected to offer more information at a 11:00 EST (16:00 GMT) news conference in California.
Wedding is accused of running a vast drug trafficking operation responsible for importing some 60 metric tons of cocaine a year into Los Angeles, Attorney General Pam Bondi previously said.
The organisation operated across North America and other countries and was also the largest supplier of cocaine to Canada, bringing in an estimated $1bn a year.
Before he was arrested, Wedding was accused of killing a federal witness in a case against him.
Wedding has reportedly been charged with witness tampering and intimidation, murder, money laundering and drug trafficking.
The FBI had placed a $15m (£11m) reward for information leading to his arrest.
The BBC has contacted the Royal Canadian Mounted Police (RCMP) and the FBI for comment.
Officials in the US have compared Wedding to other famous drug kingpins in Latin America, including Pablo Escobar in Colombia and Joaquín “El Chapo” Guzmán in Mexico.
His aliases include “El Jefe,” “Giant,” “Public Enemy,” “James Conrad King,” and “Jesse King”, the FBI says.
Officials allege that he launched his criminal enterprise following his release from a US federal prison in 2011, where he was serving a sentence for cocaine distribution.
Authorities allege he has ordered dozens of murders across the globe, including in the US, Canada and Latin America.