MEXICO CITY (Reuters) - Police in northern Mexico discovered more than 600 Central American migrants hiding in three long cargo trucks headed to the United States late on Thursday, in one of the biggest round-ups of U.S.-bound migrants by Mexican authorities in years. Almost 200 of the 652 migrants found in the non-descript white refrigerated trucks were unaccompanied children and teens, the police said in a statement. A security source told Reuters the migrants found in the trucks were almost 90% Guatemalans and had been transported to a nearby migrant center in Tamaulipas where their legal status would be reviewed. On Friday, the migrants were given COVID-19 tests and at least nine came back positive, though most have only mild symptoms, officials said. Four other individuals were arrested by police, but it was not clear if they were suspected of being the smugglers.
