Toronto police now say a "suspicious package" they detonated in front of the Air Canada Centre Friday evening was a plastic replica grenade.

The incident closed a large portion of Maple Leaf Square at Bremner Boulevard and York Street, and also caused pedestrian traffic to be diverted. The area has since reopened.

The investigation also restricted access to gates five and six and took place as the Raptors played the Dallas Mavericks at the Air Canada Centre.

Police told CBC Toronto that they received a call about the suspicious package before 6 p.m. and were attempting to resolve the situation before the start of the game.

Firefighters and ambulances arrive at the scene. (Katherine Brulotte/Radio-Canada) The police's Chemical, Biological, Radiological, Nuclear Explosives (CBRNE) team was on scene. Firefighters and ambulances were also on scene.

The plastic grenade was among four suspicious packages Toronto police reported today.

Police say that a package they found at a business at Bay and Front streets Friday afternoon contained an "unidentified powdery substance" but no injuries were reported.

Also Friday afternoon, police were unable to locate a package that was reported at Sheppard Avenue and Bonnington Place.

After the incident at Maple Leaf Square, police and the CBRNE team responded to another report of a suspicious package Blue Jays Way and Northern Linear Trail. It was reported that an "unfamiliar blue bin" was on the property. The scene is now clear.