Children go missing as Central American migrants clash with Mexican forces

Members of Mexico's National Guard hold their shields to block migrants, part of a caravan travelling to the U.S., near the border between Guatemala and Mexico, in Ciudad Hidalgo, Mexico. [Reuters]

Mexican security forces fired tear gas at rock-hurling Central American migrants who waded across a river into Mexico earlier on Monday, in a chaotic scramble that saw mothers separated from their young children.

The clashes between hundreds of U.S.-bound Central Americans and the Mexican National Guard underscores the challenge President Andres Manuel Lopez Obrador faces to contain migration at the bidding of his U.S. counterpart Donald Trump.