Mexican officials on Sunday were attempting to return almost 200 Central American migrants to their home countries after they escaped an abandoned trailer. The migrants were found Saturday in a trailer in Veracruz state, about 400 miles from the U.S. border, Mexico's National Institute of Migration said. The rescue came a week after 10 undocumented immigrants died in a packed, overheated trailer in San Antonio, Texas. Officials told AFP news service the 178 occupants of the truck Saturday apparently realized they had been abandoned by the traffickers and a few escaped, seeking help from local residents who provided food and water. The Central Americans were shuttled to a migration center for medical assistance before the process began to return them to their home countries, the migration agency said.