The son of Mexico and Real Madrid football legend Hugo Sanchez was found dead on Saturday along with another man in a Mexico City apartment, officials said.
The body of 30-year-old Hugo Sanchez Portugal was found by his wife when she arrived in the apartment in the morning, Mexico City public security chief Jesus Rodriguez Almeida told reporters.
Investigators are probing the cause of death "because there are different possibilities at the moment," he said. A Red Cross spokesman told AFP earlier that, while the cause of death has not been confirmed, it was "apparently a gas intoxication."
His famous father arrived in Mexico City from the California city of San Diego after being told about the death, local media said.
A mobile crime lab of the prosecutor's office was parked in front of his son's building located on a busy street of the upper-class Polanco neighborhood. Police entered the building while an ambulance was parked in the garage.
Sanchez Portugal was born in Madrid to the football player and his first wife. He had been sports director of the Miguel Hidalgo borough since October 2012, which includes Polanco. Sanchez Portugal played forward for Mexican clubs Pumas and Potros de Atlante and also worked as a television sports commentator.