The U.S. has closed its southern border again to livestock imports, saying a flesh-eating parasite has moved further north in Mexico than previously reported. Mexico's president was critical Thursday,

Secretary Rollins takes decisive action and shuts down U.S. Southern border ports to livestock trade due to further northward spread of New World screwworm in Mexico.

The U.S. has again halted livestock imports from Mexico after the parasitic New World screwworm fly closer to the border.  Earlier this week, Mexico's national agriculture department reported a new case of New World Screwworm in Veracruz state,