Mexican immigration authorities say 424 migrants from African countries arrived at the southern state of Chiapas over two days last week.
The National Migration Institute said Tuesday that it has issued them 20-day transit visas that will allow the migrants to reach the U.S.-Mexico border, where they plan to request asylum.
17:20 Mexico says will 'not accept' unilateral U.S. immigration policies16
23:38 President Trump sends two Cabinet members south of the border13
00:25 AP Exclusive: DHS weighed Nat Guard for immigration roundups14
20:02 White House Denies Report That National Guard Would Be Used for Immigration Round Ups30