Horacio Sala, the father of Emiliano, has died of a heart attack three months after his son's tragic plane crash.
The news was confirmed by Julio Muller, a local politician, who told local media that Sala had passed away in the night and couldn't be saved by paramedics.
"2019 doesn't let up in shocking us with news in this town," Muller said.
"At 5 o'clock in the morning, the lady, his wife, rang me and she was very upset.
"The doctors were there but when I arrived at their home, he had already died."
Daniel Ribero, the president of local football club San Martín de Progreso, told Canal 5 news that Sala's death was so devastating because the 58-year-old had recently shown signs of improvement after such a difficult period in the wake of his son's death.
"I was with him just this week," Ribero said.
"I came across him in the street and we spent half an hour talking about the soya harvest, his truck... I noted that he seemed better, he wanted to talk."
Emiliano Sala, Horacio's son, died tragically in January when a plane he was flying on with pilot David Ibbotson crashed in the English Channel en route from Nantes to Cardiff.
Thousands of people turned out to the 28-year-old's funeral in his hometown of Progreso, including Cardiff City manager Neil Warnock.
