The family found dead in their vacation rental in Tulum, Mexico, reportedly inhaled toxic fumes due from a boiler in the unit.

Miguel Angel Pech, state attorney for the Yucatan Peninsula state of Quintana Roo, reportedly said on Mexican talk radio network Radio Formula that authorities believe a gas leak from the boiler caused the deaths of Amy and Kevin Sharp and their two children Sterling, 12, and Adrianna, 7.

The family, from Creston, Iowa, was found dead on Friday in their vacation rental following a request for a wellness check. A relative told CrimeOnline that she and other family members filed a missing persons report on Thursday when the Sharps did not return from their trip as planned.

According to NBC, Perch said that authorities are continuing to investigate the source of the toxic gas and determine the cause of any malfunction.

All the indications are that a gas leak was the cause of the death of four members of a family in Bahía Príncipe de Tulum, Quintana Roo, and installations are already being investigated to determine what happened and who is responsible,” Pech reportedly said.

The Sharps reportedly rented the condo from VRBO. Home Away, VRBO’s parent company, released a statement about the tragedy.

“Our most heartfelt condolences go out to the loved ones of the Sharp family for their tragic loss. We are monitoring this devastating situation closely and have removed the property from our site for any future bookings while we wait for more details.”

[Feature image: The Sharp Family/Facebook]