At approximately 2:17 p.m. on Tuesday, Keizer Police responded to a 911 call at the Keizer Station Apartments in the 5400 block of McLeod Lane NE.
As a result, a 21-year-old male was charged with misdemeanor domestic menacing after he threatened his 21-year-old ex-girlfriend with a firearm.
A witness told officers the suspect likely possessed additional weapons and a device described as a grenade inside his apartment.
Salem PD Bomb Squad responded, and after the complex was evacuated located a legal smoke grenade inside the apartment.
After the scene was declared safe residents were allowed to return to their apartments.
The suspect was lodged at the Marion County jail.