MATIAS ROMERO, Mexico—The caravan of Central American migrants that raised the ire of U.S. President Donald Trumpwas slowly breaking up early Thursday and organizers said there were no longer plans to make it to the U.S. border, defusing a growing bilateral crisis between the U.S. and Mexico.
Mexican immigration officials have offered the migrants either a 30-day humanitarian visa to seek asylum in Mexico, which if granted would allow them to stay and work in the country, or a 20-day permit to leave the country. In both cases,...