Mexican authorities discovered a decomposing corpse with "signs of violence" near Tijuana's Caliente Stadium, where the Iranian national soccer team is training during the World Cup, Toyota SUV with California plates parked in a grocery store parking lot near the stadium, the Post reported.
"Upon inspecting the vehicle, they found a person wrapped in a black bag in the trunk, showing signs of violence," a spokesperson for the Tijuana prosecutor's office told the Post.
According to the report, the car had a damaged back end and was equipped with a license plate holder from a Tijuana car dealership.
Mexican officials wore white jumpsuits while collecting evidence from the car in photos taken from the scene.
Tijuana, located just across the U.S.-Mexico border from San Diego, California, is frequently rated one of the most violent cities in the world.
Iran's national team is training at Caliente Stadium in preparation for its upcoming World Cup game against New Zealand at Los Angeles' SoFi Stadium Monday.