Aldo Sarabia, who played the tuba in the group, was reported missing last week.
It was the latest in a string of killings and suspected massacres in Mexico in recent weeks and months that have cast a shadow over President Enrique Pena Nieto’s drive to focus public attention on economic reforms rather than grisly violence.
The case is being investigated as a homicide, a source from the prosecutor’s office of Sinaloa state told Reuters, without giving any more information. Sarabia’s body also showed signs of a beating, local media reported.
“Aldo, although we’re devastated by your loss, life forces us to be strong, and to find refuge in the beautiful moments we lived with you,” the band said in a statement posted on its Twitter feed.