Three people were arrested and one faces charges after bear spray was released inside Yellowknife's Crestview Manor apartments on Sunday.
On Monday afternoon, RCMP confirmed a man and two women had been detained.
Brittany Ann Beaulieu, who is 32, faces charges relating to assault with a weapon, property damage, uttering threats, and common nuisance.
In a statement, RCMP said the two other individuals "are known to police and the incident is still under investigation."
Police say they received a complaint of people damaging a window at the 52nd Street building just before 12pm on Sunday.
Officers found an empty can of bear spray on arrival at the building. The City of Yellowknife said several residents were checked by emergency crews at the scene after exposure to the spray, but nobody required hospital treatment.
"The initial responding crew arrived on scene to find no residents in immediate danger or in need of medical treatment," read a City statement issued earlier on Monday.
"Five residents were assessed on-scene as a precautionary measure due to complaints of effects from the released spray. No residents were transported to the hospital.
"The building was ventilated with fresh air and management and residents were advised that no further issue existed."
The first floor hallway of the building was affected.
Bear spray is a form of pepper spray used to deter wildlife by producing a burning sensation. Bear sprays are normally stronger than pepper sprays sold for self-defence against human attackers.
No bear is reported to have been involved.