Mexican President Felipe Calderon has asked U.S. House Speaker John Boehner to crack down on weapons trafficking that has fueled drug violence in Mexico.
Calderon's office says the president stressed the importance of stopping illegal trafficking of weapons and cash into Mexico.
The government says Mexico's drug cartels import much of their weaponry from the United States.
Boehner and Michigan Rep. Dave Camp visited Mexico on Friday along with other members of Congress to discuss security and economic and political issues with Mexican officials.
Calderon's office says the U.S. delegation praised Mexico's five-year offensive against drug cartels.
The U.S. delegation previously visited Colombia and Brazil.