Volunteers must have first-aid and CPR training. (St. John Ambulance)

St. John Ambulance says it can no longer provide first aid at community events in Fredericton and Moncton because of a lack of volunteers.

Larry Broad, CEO of the service in New Brunswick, said the organization is shutting down its emergency first-responder teams in the cities.

"We're at a point where it makes it very difficult to fulfill our commitments. And if we can't fulfill our commitments, then of course it's difficult to commit to an organization to say we'll be there to provide first aid service at their event," he said.

Volunteers have to be at least 16 years old and have training in first aid and CPR. They are expected to work at least 60 hours a year, according to the group’s website.

Broad said one volunteer in Fredericton did 170 shifts last year and is retiring. He said it's difficult to find other volunteers willing to put in the time.

"This is not the fault of any volunteer or anything like that. It's just basically societal changes, more demands on people's time and so on, makes it very difficult," he said.