The bodies of 17 migrants were found in a burnt-out vehicle in the town of Camargo in Tamaulipas state.
Investigators say they were killed as part of a turf war between criminal gangs over control of migrant smuggling routes in the area.
Every year, thousands of people from Central America attempt to make the long journey to the US through Mexico.
A total of 19 bodies were found in the charred vehicle in Camargo in January 2021.
Sixteen were found to be from Guatemala and…