"Mexico stations migration agents, local and federal police, soldiers and marines to create a kind of containment zone in Chiapas state. With roving checkpoints and raids, Mexican migration agents have formed a formidable deportation force. Since the Southern Border Plan launched, Mexico has deported more than half a million Central Americans, including almost 82,000 last year, according to data from Mexico's Interior Department. Since 2015, Mexico has deported more Central Americans annually than U.S. authorities have, in some years more than twice as many."
https://www.npr.org/sections/parallels/2018/05/07/607700928/mexico-deploys-a-formidable-deportation-force-near-its-own-southern-border
https://www.npr.org/sections/parallels/2018/05/07/607700928/mexico-deploys-a-formidable-deportation-force-near-its-own-southern-border