Fredericton, a city of about 56,000, is the capital of the province of New Brunswick.
The circumstances of the shooting were not immediately known.
Between 7 a.m. and 8 a.m., Moore said there was a large police presence on Brookside Drive where officers appeared to be focused on a single residence.
Officers now say there is no longer a threat to public safety. Do not disclose police locations on [social media].
The Fredericton shootings come just four years after another traumatic event for police and the public in another New Brunswick city.
He heard similar sounds about five minutes later, near his home, he said.
Canadian Prime Minister Justin Trudeau said it was "awful news coming out of Fredericton". "Obviously, we have no way of knowing at this time what the situation is, but there seems to be the same level of worry and fear".
More news: Rockstar Games Provides the First Look at Red Dead Redemption 2 GameplayTravis Hrubeniuk, 27, said his fiancee had just left for work around 7:45 a.m. when he began hearing a steady stream of sirens.
Two police officers were among four people killed Friday in a shooting that sparked panic and a police lockdown in a sleepy town in eastern Canada. "Residents are encouraged to follow their direction", he said on Twitter, referring to the Royal Canadian Mounted Police.
He said that police have been searching the complex floor-by-floor.
Here is what a quiet, residential Fredericton neighbourhood looked like this morning after it was rocked by gunfire. They have searched all the apartments in the building.
"At times like this, we as a city and a province need to draw together for mutual support and comfort", said Anglican Bishop David Edwards in a statement.
Sara Burns, 43, joined the Fredericton Police Force in 2016 but previously served as an auxiliary officer for two years.
Robert DiDiodato, who lives on Oakland Avenue, which connects to Brookside Drive, said he heard a series of "firecracker" sounds.
