Police have issued a public safety alert after a number of razor blades were found scattered throughout several downtown parks.

The first discovery was made at June Callwood Park, in the Bastion and Fleet streets area, on Monday afternoon.

According to police, a woman was walking her dog in the park when she spotted a number of loose razor blades mixed in with the gravel.

"I was up at CityPlace on the back path, near Ice Boat Terrace, and I found a couple razors and didn't think much of it. Then I came over here in the southeast corner and found a pile of them, maybe about six (of them)," Cole Courneya told CTV Toronto.

Courneya indicated that she had made similar discoveries a number of times over the past week, police said.

"They're the same colour as the gravel and mixed in there. I don't know, you could step on them and dogs pick up everything in their mouths," she said.

Police investigated June Callwood Park on Monday night but returned to the area on Tuesday morning after a CTV News Toronto reporter said she found at least four more blades in the gravel.

The second discovery was made at Lisgar Park near Queen and Sudbury streets. Police are also investigating a third report of razor blades scattered in the CityPlace area.

No injuries have been reported in either discovery.

"It's your traditional style razor blade and it's square in nature and it has 'Made in Germany' (on it). So both razor blades found at both parks, both are very similar," Const. Jenifferjit Sidhu told CTV Toronto.

Anyone with information is asked to contact police at 416-808-1400 or Crime Stoppers at 416-222-TIPS (8477).