Paramedics who entered room at Mexico resort where American couple were found dead felt dizzy

Paramedics who entered the Mexican resort hotel room where an American couple was mysteriously found dead have said they started feeling dizzy almost immediately and feared they might die.

Abby Lutz, 28, and John Heathco, 40, were discovered unresponsive in their hotel room at the five-star $780-a-night Hotel Rancho Pescadero near Cabo San Lucas on Tuesday. 

Paramedic Fernando Valencia and his partner, who was his sister, told ABC they were among the first people to enter the couple's room where Heathco was found in the shower and Lutz in the bed.

Their comments come after it was revealed that the couple was hospitalized days before their passing with what they had thought was food poisoning.

The boutique hotel, which is owned by Hyatt, disputed suggestions there may have been a gas leak, saying in a statement it does 'not believe that the cause of death was related to any issues with the hotel's infrastructure or facilities, including carbon monoxide or a gas of any kind.'

Abby Lutz, 28, and John Heathco, 40, were discovered unresponsive in their hotel room at the five-star, $780-a-night Hotel Rancho Pescadero near Cabo San Lucas

Paramedic Fernando Valencia said he and his partner felt dizzy within minutes of entering the couple's hotel room and thought they may die

Fernando Valencia and his sister are pictured. They were among the first two to enter the hotel room

'My partner and I, we started to feel dizzy and we came out. We went out of the room soon as possible and I was afraid for my partner because my first thought in mind, was are we gonna die?' Fernando told ABC's Good Morning America.

He and his sister were so concerned they sought medical treatment themselves. 

'It was one of the worst experiences that I've felt,' he said.

Hotel Rancho Pescadero is located in the village of El Pescadero, by the Pacific Ocean on the Baja California Peninsula.

Heathco and Lutz had been dead for about 10 or 11 hours and when they were found and there were no signs they had been fighting.

The State Attorney General's Office of Baja California Sur said in a statement on Thursday that the cause of death was 'intoxication by substance to be determined.'

Lutz's family say that she had been messaging her father the day before she was found dead, claiming she was feeling sick and had visited a hospital.

'She had been texting her dad and telling him the same thing, that she was feeling sick and went to the hospital, stayed one night on IV, and felt so much better,' her stepmother told ABC.

'She texted him Monday night to say good night, love you, and then we hadn't heard from her again,' she added. 

Her stepsister, Gabby Slate, said the family now wants answers: 'We want to know exactly what happened and we just don't know that yet.'

The couple was staying at the $780-a-night Rancho Pescadero hotel in El Pescadero, near Cabo San Lucas

Hotel Rancho Pescadero is located in the village of El Pescadero, by the Pacific Ocean on the Baja California Peninsula 

Lutz's family has said they now want answers as to what led to their death in the hotel. The hotel's manager has said he does not believe there was a gas leak but the AG's office said that there was an unidentified intoxicant involved

Abby, 28, with her younger brother, who paid tribute to her on Thursday 

In a statement, her sister told DailyMail.com: 'We are shocked and saddened to hear about the passing of our beloved Abby. Abby had an adventurous spirit and a wonderfully kind heart. 

'She loved to travel, see new places, and share her zeal for life with those around her. We ask for your thoughts and prayers for our family during this very difficult time. 

'In lieu of flowers, we ask that donations be made to GoFundMe to help us lay Abby to rest.' 

The most common symptoms of carbon monoxide poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. 

They can often be described as 'flu-like,' according to the CDC. People who are sleeping can however die from carbon monoxide poisoning before they present symptoms.