Marines detained Jesus Alfredo Guzman Salazar in the western state of Jalisco thanks to intelligence work, the Navy said in a brief statement. It didn't say when the 26-year-old Guzman Salazar was caught or offer any other details.
Earlier this month, the U.S. Treasury Department announced it had placed financial sanctions on Guzman Salazar and his mother, Maria Alejandrina Salazar Hernandez. That bars American citizens from doing business with them and allows authorities to freeze their assets in the U.S.
Guzman Salazar and his father were indicted on multiple drug trafficking charges in the U.S. District Court for the Northern District of Illinois in August 2009, the department said.
Authorities in the U.S. and Mexico have said they believe Guzman Loera has children with several partners, including a woman whom he married in an elaborate public ceremony in 2007 and who recently gave birth to twins in California. The Treasury Department described Salazar Hernandez, 53, as a wife of Guzman, without providing details.
In May, the department announced similar sanctions against Guzman's sons Ivan Archivaldo "El Chapito" Guzman Salazar, 31, and Ovidio Guzman Lopez, 22.
Ivan Archivaldo Guzman Salazar was detained in Jalisco state on money laundering charges in Mexico in 2005, but was later released. Guzman Lopez plays a significant role in his father's drug trafficking activities, the department said.
"El Chapo" Guzman was put on the Treasury Department's list in 2001, the year he escaped from a maximum security prison hidden in a laundry truck. He has evaded authorities ever since, moving from hideout to hideout as he directs the operations of his cartel and a fight against rivals that has left thousands of people dead across Mexico.
In 2009, Forbes Magazine put Guzman Loera on its list of the world's richest people, with an estimated $1 billion fortune.