Mexican President Andres Manuel Lopez Obrador said on Wednesday that clashes between migrants and members of the National Guard on the border with Guatemala this week were an "isolated case" and that security forces are instructed to not use violence.

The influx of U.S.-bound Central
American migrants seeking to pass through
Mexico has posed a major headache for Lopez Obrador amid fierce pressure from the administration of U.S. President
Donald Trump to prevent the asylum seekers from reaching the U.S. border.
Mexican security forces on Monday fired tear gas at groups of rock-hurling Central American migrants who waded across a river into Mexico earlier in a chaotic scramble that saw mothers separated from their young children.