Fredericton police says at least four people have died in a shooting. "We will provide more info when we can", they said.
After announcing that the suspect - who has not been identified - is in custody, police tweeted that the Brookside area would be "contained for the foreseeable future" because the investigation is ongoing.
Police are asking people to avoid the area of Brookside Drive between main and Ring Road.
That CBC report adds that there has been massive emergency services response to the area, including police, paramedics and firefighters.
Speaking to Global News, another resident, Dave MacCoubrey, said that he could have heard as many as 17 shots coming about 30 feet from his bed.
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Police are at the scene and the incident is ongoing. They had previously warned the public not to expose the whereabouts of police as they worked to address the situation.
"Doors are locked and everybody's inside", he said.
Travis Hrubeniuk, 27, said his fiancee had just left for work around 7:45 when he began hearing a steady stream of sirens.
The CBC contacted employees at a nearby Tim Hortons and they said they have locked their doors so customers can't exit or enter. She said she heard a "crack, crack, crack, four in a row" in rapid succession. "It's a little off-putting that way, and I've been here for about a year".