Hyatt Hotel Rancho Pescadero in El Pescadero in the state of Baja California Sur –

“In a statement Wednesday, the local attorney general’s office said both had died from “intoxication by substance to be determined.” Earlier reports of the deaths suggested more specifically that gas inhalation was suspected.”

Two Americans Found Dead Inside Luxury Mexican Hotel Room (yahoo.com)

“A Hyatt spokesperson did not immediately respond to questions about whether rooms at Rancho Pescadero, which start at more than $600 a night, are equipped with carbon monoxide detectors.”

Two Americans found dead in luxury hotel room in Mexico – Los Angeles Times (latimes.com)

Current and former employees at a luxury hotel in Mexico where two Americans were found dead said managers ignored signs of a possible gas leak and disabled carbon monoxide detectors so alarms would not disturb guests.

Mexican resort where 2 Californians died ignored gas leaks, workers say – Los Angeles Times (latimes.com)

“’They knew there were problems with a gas leak,’ Ricardo Carbajal, the former night manager of Rancho Pescadero, told The Los Angeles Times.

Mr Carbajal, who stopped working at the luxury hotel in March, said carbon monoxide detectors went off frequently over a period of three months last year before hotel managers disabled the alarms due to noise complaints.”

https://news.yahoo.com/mexico-hotel-where-us-couple-144419764.html?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAAHvryhnD21sSU0Dft0i1-71TxlTqmK8fKZbR-GLnlIGDxAxfOkzyvaAtFC5P_LhSQdO0YRkOB1pOxJfGLql-Cv5Qw7zjKFZG9qneAaKwZVdtUGHthw0c16slEOE8e1zzQxVpXugV4l4_czvemhY8foh_5ozyqm9V45dnYfZmJ-K7