Police were called to the Regent Mall around 4 p.m. AT Saturday after an "altercation" in which a firearm was seen, according to a news release.
No shots were fired and no one was hurt, according to police. They have identified "persons of interest," but they have made no arrests.
On Sunday, police still weren't releasing many details. But they did say the incident happened near the entrance to the mall, and say they were able to confirm through surveillance video that those involved left the mall heading west toward Bishop Drive.
The police presence lasted until about 7:30 p.m. at which time most of the police vehicles left and people who had been sheltering in place were escorted outside.
In a tweet, mall management said police had completed their on-site investigation and given the all-clear. The mall is scheduled to be open for normal shopping hours on Sunday.
'Considerable police presence'
At 4:42 p.m., mall management announced on Twitter that the mall would close for the rest of the day due to "unforeseen circumstances."
In a tweet sent at approximately 4:45 p.m., the Fredericton police said they had a "considerable police presence" at the mall because of an ongoing call for service.
"The mall and the immediate area have been evacuated while we investigate," said the police.
"Please avoid the area."
Police later specified that they were responding to a "weapons complaint."
While most of the mall was evacuated, police say some people had to shelter in place inside the mall.
Police asked the public not to post details about police movements on social media. They also asked media reporting from the scene to move away to a neighbouring hotel.
Multiple police and RCMP vehicles were stationed at the mall's entrances and exits. Several officers could be seen outside their vehicles carrying long guns. The Fredericton Police Emergency Response Team was also called in.
Anyone with information about the ongoing investigation is asked to call Fredericton police at 460-2300, or Crime Stoppers at 1-800-222-8477, to remain anonymous.