A child is dead and 14 others were rushed to hospital Wednesday with flu-like symptoms from a house on a First Nation west of Calgary.

The precise cause of the incident is unclear, but Emergency Medical Services said it appears to be 鈥渟ome type of illness鈥� and that the patients exhibited

Paramedics responded to a residence on Stoney Nakoda First Nation, a community about 60 kilometres west of Calgary, just before noon. Inside the house, paramedics found two children in 鈥渟evere medical distress,鈥� according to Stuart Brideaux, a public education officer with EMS.

One child died at the scene, and the other child was rushed to hospital in serious condition, Brideaux said.

Thirteen other patients -- 9 pediatric patients and four adults -- were also transported to hospital. Most are in stable condition.

A family member told CTV Calgary that the child who died was only four or five months old. CTV Calgary reports that some people in the house had been sick for days with respiratory issues.

A medical examiner is expected to arrive at the residence Wednesday night, an investigator from Cochrane RCMP said.

The patients ranged in ages from four months to a male in his late teens, Brideaux said. The young victims were brought to the Alberta Children鈥檚 Hospital in Calgary via ambulance.

Throughout the day, people were seen entering the home to offer hugs and condolences. At least six RCMP vehicles were parked outside the property.

The family was too upset to speak on camera, Stoney Nakoda Emergency Services Security told CTV Calgary.

Officials are now investigating the origin of the incident. Brideaux said the cause appears to be 鈥渕edically based,鈥� and officials do not believe trauma or a noxious substance, such as carbon monoxide, played a role.

"At this time, EMS is working to sort out the potential origin of the circumstances," he said.

The relationship between the 15 individuals, including whether they were related, has not been determined.

Earlier in the day, EMS reported that 14 children and one adult were involved, but later clarified the numbers.

The Ministry of Indigenous Services has reached out the Stoney Nakoda First Nation to offer support and is in the information-gathering stage, CTV News has confirmed.

Minister of Indigenous Services Jane Philpott is aware of the incident.