UPDATE: Highly concentrated pepper spray causes irritation to multiple people at Bayside apartment complex

Updated: 9:08 p.m. October 28, 2017

BAYSIDE, Wis. (CBS 58) -- Bayside Police say the cause of the odor was bear spray which is a highly concentrated pepper spray. The spray is typically used by hunters if they encounter a bear in the woods.

Two people were treated on scene for irritation but declined being taken to the hospital.

The apartment that the spray was released in is being ventilated and is not currently livable.

Bayside Police are investigating to see if the resident of the apartment intentionally discharged the airspray.

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Posted: 6:12 p.m. October 28, 2017

BAYSIDE, Wis. (CBS 58) -- Multiple people have been treated after an irritating odor was observed in an apartment complex in Bayside.

North Shore Fire Department responded to the odor in the 9000 block of North White Oak Lane.

The Milwaukee HazMat team responded to the incident and is doing hair samples to figure out what the odor is.

The people impacted by the odor were treated on scene and released.