"We have had one report of that and we have been trying ever since to find this person and establish what they had with them," said RCMP Cpl. Chantal Farrah. "It's not to alarm anybody. It's just to be cautious and vigilant."
At about 11:15 a.m. Sunday, RCMP received a call about the suspicious person walking down Katherine Avenue.
The RCMP have blocked off areas near Mountain Road, Mapleton Road, Kendra Street, Connaught Avenue, Killam Drive, Anne Street and West Lane.
RCMP are canvassing homes in the area to identify the person.
"When we get these calls, we're treating them as if it is a firearms call until we can disprove," said Farrah.
Last June, three RCMP officers were killed and two others injured by a man walking around a part of the city with a gun.
"Since that incident in Moncton — everyone as a community — we all have a heightened sense of awareness," she said. "We've been having a lot of calls since that horrible day, of people reporting things and doing the right thing."
Police are asking residents to stay inside their homes to limit traffic in the area while this search is underway.
An RCMP police dog and emergency response personnel are on the scene.
The man is described as possibly being in his late teens with dark-coloured hair. He build is average, or possibly slim. He was wearing dark–coloured pants and a grey–coloured jacket with red stripes on the sleeves. He was also said to be wearing a dark–coloured, knitted toque.