RCMP say the suspect wanted in connection with a triple-homicide in a rural Alberta home was shot by police during his arrest and taken to hospital.

Police say no one else was hurt during the incident.

At a press conference on Tuesday, Supt. Gary Steinke, Officer-in-Charge of the RCMP Serious Crimes Unit, said the suspect’s injuries are "serious" and he had been taken to a hospital in Edmonton.

Police had a warrant to arrest Mickell Clayton Bailey, 19, in the deaths of three people: Roxanne Berube, her boyfriend Daniel Miller, and an unidentified woman.

Steinke said at least one of the victims knew the suspect.

“It wasn’t a random homicide. They knew each other,” Steinke said.

The victims’ bodies were found Sunday in their home near Edson, Alta., 192 kilometres west of Edmonton.

Steinke said there were "significant RCMP resources" when they confronted Bailey, who was in "close vicinity" to the home.

He added that Bailey was armed and they intended to make a "peaceful arrest."

"Unfortunately, that did not work out the way we wanted it to, and unfortunately that person was shot," he said.

Bailey is facing two charges of first-degree murder and one count of second-degree murder.

Steinke said the incident has "shocked" local citizens and police.

"The murder of the three innocent victims in their own home is unsettling for even the most seasoned police investigator," he said.

Steinke said that a quick arrest was made possible by "very good police work" and help from the community.

He described Edson as a "small community" where "everybody knows each other."

Steinke said that typically people in this situation "aren't always comfortable coming forward and talking about friends, relatives and neighbours"

"But that wasn't the case, people did come forward and talked openly about what they knew about the case."

Berube worked at a local McDonalds and had been dating Miller for two years.

Edson Mayor Gregy Pasychny said that the community was stilling coming to grips with their deaths.

"The biggest question I keep hearing is: Why? Why them? Why did it happen to them? There's a lot of confusion on that and I think people really want answers," he said.

Earlier on Monday, authorities revealed that the three victims, who were found dead in a home they shared, suffered "obvious trauma."

Autopsy results have yet to be completed.

Insp. Gibson Glavin told The Canadian Press that their bodies were discovered after responding to a call from someone outside the home.

The Alberta Serious Incident Response team, which investigates cases involving police that resulted in serious injury or death, is also probing the incident.

With files from CTV's News' Janet Dirks in Calgary