Mexican authorities found 175 migrants crowded in a truck trailer in the southern state of Chiapas, news agency Reuters reported citing the National Migration Institute (INM).

Mexican officials find 175 migrants crammed in a truck trailer near southern border

In pics: Thousands of migrants in Mexico head to US border coinciding with Americas summit

Mexican troops used tear gas to detain 800 migrants who surged into Mexico Thursday after wading across a river on the country's southern border with Guatemala. National Guard forces in the southern state of Chiapas prevented them from continuing their journey by forming a human fence along a road, as panic erupted among some of the migrants.

Mexico detains 800 Central American migrants headed to United States