Kathmandu: Eight tourists from Kerala, who were found unconscious at a resort in central Nepal, died while undergoing treatment at a hospital in Kathmandu on January 21.

The deceased are four adults and four children. They were part of a group of 15 people who were visiting Daman, a tourist destination near Kathmandu, Makwanpur superintendent of police (SP) Sushil Singh Rathore said.

All eight people, who hailed from Kerala, had stayed in the same room at night and turned on the gas heater to keep warm, suggesting that the cause of death might be suffocation, Rathore added. The deceased have been identified as Prabhin Kumar Nair (39), Sharanya (34), Renjith Kumar TB (39), Indu Renjith (34), Sreebhadra (9), Abhinav Soorya (9), Abhi Nair (7) and Vaishnav Renjith (2).

The manager of the resort told Himalayan Times that the guests had booked four rooms, but eight of them stayed in a room, while the remaining stayed in another room.

They were airlifted in two sorties to HAMS hospital in Dhumbahari, Kathmandu, where they were declared brought dead on Tuesday morning. "The group had checked in at the hotel at 9 pm on January 20. An investigation is underway," Rathore said.

 The resort is at an altitude of nearly 2500 metres above sea level. The postmortem will be carried out today.