Two top leaders of Mexico's Sinaloa drug cartel, including its co-founder Ismael Zambada Garcia, were arrested on Thursday in the U.S. state of Texas, the U.S. Department of Justice said.

"Ismael Zambada Garcia, or "El Mayo," co-founder of the Cartel, and Joaquin Guzman Lopez, a son of its other co-founder, were arrested today in El Paso, Texas," Attorney General Merrick Garland said in a statement, calling the cartel "one of the most violent and powerful drug trafficking organizations in the world."