Volunteers are trying a new tactic in their search for a missing high school student from Saint John.

On Monday, they carried posters door-to-door in Genevieve Cormier's neighbourhood on the city's lower west side.

Cormier, 19, disappeared on Sept. 29. Police have confirmed she was last spotted in the parking lot near Boaz Restaurant and Reversing Falls.

"We are still investigating and following the tips and leads that do come forward from the public," Sgt. Jay Henderson said in an email to CBC News.

The major crime unit is still leading the case, said Sgt. Henderson.

"We have nothing at this time to suggest foul play is involved. We are treating the file as a missing persons case," he said.

Volunteer-led search expands

Amanda Hensey, the volunteer search co-ordinator, said she hopes a canvass of the neighbourhood could shed more light on what happened to Cormier.

Genevieve Cormier search

Volunteers spent Monday canvassing Genevieve Cormier's neighbourhood, in an attempt to reach people who may not have been aware of her disappearance. (CBC)

"Anything that may help police and help us further pinpoint Genna's last location," she said.

"We're just trying to get those thoughts together that people may not remember. Last Sunday, around 4 p.m. or 4:30 p.m., if you remember seeing something, please contact police and give them that information."

Multiple searches last week failed to turn up any new information on Cormier's disappearance. They concentrated on the hillside and woods near Reversing Falls, Bayshore Beach, and the Lancaster neighbourhood.

On Friday a search was conducted with assistance from the coast guard, looking along the banks of the St. John River.

Jason Cormier, the missing teen's father, said "it's been a terrible week."

Genevieve Cormier

Saint John police are looking for the public's help to locate Genevieve Cormier, 19, who was last seen on Sept. 29. (Facebook)

"I just take it day by day … My family has been good for me, and everyone else has been giving support."

Saint John police have posted photographs on the force's website showing surveillance camera footage of Cormier that was taken on Sept. 29, in order to show what she was wearing when she went missing.

Cormier is described as being about five feet seven inches to five feet eight inches tall, weighing 120 pounds with a thin build.

She has long brown hair that she wears straight, or in a ponytail. She has hazel eyes and will usually wear a light amount of makeup.

Cormier has pierced ears and a black bird tattoo on her left shoulder blade.

Anyone with information regarding her whereabouts is asked to contact the police at 506-648-3333, or contact Crime Stoppers at 1-800-222-8477.