A family is grieving the deaths of two children as Canada's paramedic community mourns the loss of one of its own, all three of whom died in the same crash on an icy highway in northern Saskatchewan.

Alexa LaRiviere-Laliberte, from the hamlet of Jans Bay, Sask., said her 15-month-old daughter, Kinzey Angeline Iron-Couillonneur, and her 12-year-old cousin, Jerome Dylan Coulineur, died after the truck they were in collided with an ambulance. She wasn't in the vehicle, she said, but her father, Andrew Bruce LaRiviere, was, and is still in hospital.

"My daughter was my dad's sidekick. They were always together," LaRiviere-Laliberte told The Canadian Press over Facebook on Sunday.

A GoFundMe campaign has been launched to help cover the costs of the two funerals, as well as support family members who are staying hundreds of kilometres away from home to be with the others in hospital.

Jerome Dylan Coulineur, 12, also died in the crash. (Facebook)

Crash between ambulance and truck

RCMP said a crash between an ambulance and a truck happened on a highway near Beauval, Sask., late Friday afternoon and that road conditions were poor with slush and ice-covered sections.

Police said a man in the ambulance, who was one of just two people in the vehicle, died after being brought to hospital. They said a boy and a girl were also killed in the crash. Investigators initially said the children were among five people in the truck, but later said that in fact only four people were inside.

Gerry Morin, the Beauval, Sask., fire chief, said 10 people from his fire department responded to the crash scene.

"It was a sad sight to see," Morin said, adding that his crew had a debriefing session afterwards.

A moment of silence

In Toronto on Saturday night, the Ontario Paramedics Association observed a moment of silence at its provincial banquet dinner and then raised funds for colleagues in Saskatchewan affected by Friday's crash.

Ambulance services and other first-responder groups in Saskatchewan and across Western Canada also posted messages of condolence on social media.

"A small community, a paramedic, two young children. Absolutely devastating," Saskatoon Search and Rescue tweeted over the weekend.

Ambulance was responding to call

The Saskatchewan Health Authority said in a news release that the ambulance was from Meadow Lake EMS and was responding to a call at the time.

"The part that people don't get is, yes, we respond to calls like this every day. But you have to think that there's another paramedic present on that unit who's put in the position to treat their partner, and the occupants of the other vehicle," Ontario Paramedics Association president Darryl Wilton said in an interview Sunday.

Wilton explained that the association's banquet dinner traditionally opens with a ceremony to remember fallen members. But this year, after the moment of silence and a piper playing "Amazing Grace," he said everyone in the room sang "O Canada."

"To be there and feel that was incredible. It really brought people together," he said.

Wilton noted that families of first responders who have died as a result of their duties are now eligible to receive the Memorial Grant Program for First Responders, a one-time lump sum, tax-free direct maximum payment of $300,000 from the federal government.

But he said money that his association collected could help family in the interim. Also, he said the deceased paramedic's partner was affected and may have financial needs.

He said his group has also asked Saskatchewan colleagues to reach out to the family of the other vehicle to see if they need assistance Police say they're still investigating the crash, but say alcohol is not considered a factor.