Mexican police have found 61 bodies, including children, in an abandoned crematorium in the Pacific resort of Acapulco, authorities have told AFP news agency.
"We are working on identifying how many children, women and men" were in the building, Guerrero state chief prosecutor Miguel Angel Godinez said on Friday, without giving details about the cause of death.
Acapulco has been beset by drug gang violence but it was not immediately clear whether the bodies were murder victims, or whether the corpses were left there when the crematorium closed.
"We can't say for now that there is an indication that organised crime participated in this but we can't rule it out," Godinez told Radio Formula.
Forensic experts and investigators are seeking to determine how long the bodies were left in the building, he said.
The prosecutor said authorities may carry out arrests but he declined to give more details.
The bodies were found late on Thursday after neighbours complained about a foul smell coming from the crematorium, which was abandoned more than a year ago, a high-ranking state police official said on condition of anonymity.
The officer said the bodies were in an advanced state of decay.
Acapulco was once a favorite haunt of Hollywood stars, but the city has lost its flair over the years, while feuding drug gangs have turned it into one of Mexico's most violent places.
The port is in Guerrero state, where authorities said 43 college students were abducted by corrupt police and handed over to the Guerreros Unidos drug gang, whose henchmen killed and incinerated the victims.
The aspiring teachers, all young men, vanished on September 26 in the city of Iguala, 210km north of Acapulco.
The Iguala case has sparked protests and turned into the biggest challenge of President Enrique Pena Nieto's two-year-old administration.