EDSON, Alta. -- Friends and family have identified a woman who recently started a new job at a fast-food restaurant as one of three people killed in a rural Alberta home.

Mounties say the bodies of a man, a woman and a teenage girl -- all with "obvious trauma" -- were found in a house near Edson on Sunday.

Sylvia Standing said Monday that her goddaughter Roxanne Ruth Berube was 36, had five children and was a good mother.

There were also media reports identifying the male victim as Dan Miller.

Insp. Gibson Glavin said the deaths were not a murder-suicide.

"I will be clear that there was someone out there, or some people, who did this and we have not arrested them yet," he said.

RCMP major crimes investigators and other Mounties were speaking with people in the area west of Edmonton looking for leads and clues, he said.

Police found the bodies after responding to a call from someone outside the home.

Glavin said police don't believe anyone else is at risk, but urged people to be careful.

"We do urge the public to be cautious, to be aware of people or circumstances that cause them to believe that they have some knowledge or some connection with this homicide investigation," he said.

Glavin would not say at a news conference in Edmonton what the relationship was between the dead other than that they all lived in the house.

The investigation is not ruling out any suspects and officers would like to speak to anyone who may have information about what happened, he said.

Autopsies had yet to be performed.

A co-worker at an Edson McDonald's who didn't want to be named described Berube as a good worker and a nice person.

Berube's Facebook page has photos of five children in a snow-filled field. A post on Oct. 23 said one of the photos was taken two years ago and "my family has gotten bigger since this picture. My boyfriend (I can't wait for you guys to meet him and his family) and I have 10 kids between us and 2 grand babies."

Edson Mayor Greg Pasychny said people in the oil and gas town were heartened by assurances from the RCMP that the public is not at risk.

But he said people are still disturbed and worried about the killings.

"Any time you have an incident like this, especially with three people, it kind of sends chills through the community," he said.

"This is an isolated incident in one location. It's not like someone was going on a rampage or anything."

Yellowhead County Mayor Gerald Soroka said he does not know the identities of the dead.

"So I don't know how long they've been in the community, I don't know their ties to the area. You can be living in a community for a couple years, just like you are in the city, and not know your neighbours."

Soroka said the home where the people were found is outside Edson in a rural location.

"Is everyone concerned to some degree? Absolutely. Any time something like this happens people obviously have concerns and want to know they're safe in their own community," Soroka said.

"The problem is though that usually in these situations the victims are known to the perpetrator, usually they don't just go randomly and do something like this."

-- By John Cotter and Mary Jo Laforest in Edmonton, with files from Tamsyn Burgmann and Gemma Karstens-Smith in Vancouver