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Dangerous criminals from El Salvador, Guatemala and Honduras are hiding in migrant caravans, official says

Truck carrying migrants in Mexico overturns; 1 reported dead, 81 hurt

Caravan in Mexico broken up by national guardsmen, immigration agents

DHS boss warns caravan migrants will be sent home if they reach US, amid reports of violence

Caravan migrants cross Mexico river, throw rocks at country's national guard in response to tear gas

Mexico says it will block migrant caravan en route to US from Honduras

Honduran migrants gather to try forming new caravan

El Salvador president says his country must fix problems that contribute to US immigration crisis

Homeland Security watchdog reports overcrowding and migrants pleading for help during detention-facility tour

Dozens of Central Americans returned from US are sent home by Mexico