Cst. Jason Murray says an officer spotted a man with what appeared to be a long gun and scope entering a wooded area in Oakville Acres.
The officer then called for backup.
Police say the man was wearing a dark hoodie.
Police searched the area around School Avenue near Fairvale Elementary School, including a wooded area that is between two residential neighbourhoods and has train tracks that run through it, but did not find anyone.
Murray says not many residents were home during the search, but officers asked the people who were around to stay inside and lock their doors.
Travis Jones is staying with his grandparents next to the woods where police searched. He says the experience rattled him, and the community at large.
"I don't know what the world is coming to. You know it's kind of scary cause I know that something like this already happened in Moncton too. That's what everyone is worried about. Everybody's going nuts right now. Like all the kids on the next block — they sent them inside. They checked all the playgrounds," he said.
Jones said police advised him to stay inside, keep the doors locked and draw the blinds.
Jones first became aware of what was going on when he heard police sirens in the area, so he looked outside and saw some police vehicles and officers and the SWAT team with their guns drawn.
'He told me there was a guy walking around with a shotgun'
Jones soon tried to leave his house to head a friend's place and got into his car and was trying to leave when a police officer yelled at him to get back in the driveway. The officer then asked Jones to show him his hands and asked him to get out of his vehicle, which he did.
"He told me there was a guy walking around with a shotgun or gun and he asked if I saw anybody go down there [into the woods]," said Jones.
Jones says police did a good job of letting people in the community know what was going on.
In light of the Moncton shootings, Murray says you can never take any chances in the interest of public safety.