The commotion started about 4:30 p.m. in the area of 34th Street and Lombard Avenue, said Everett police officer Aaron Snell.
A man and woman were involved in a domestic disturbance, Snell said.
The man reportedly threatened the woman with a knife and began chasing her down the street.
A passerby saw what was happening and feared for the woman's safety, Snell said.
The passerby, 61, of Arlington, had a pistol. He fired a shot in the air.
The man with a knife then stopped chasing the woman, Snell said. The man, 48, was detained by a group of people until police arrived. He was arrested for investigation of unlawful possession of a dangerous weapon.
Police also spoke with the man who fired the shot, Snell said. They don't expect to pursue criminal charges against him.
Officers on Wednesday night were trying to find the woman involved.
More Local News Headlines
Snohomish County leads all others in population growth Bellevue man arrested in string of Edmonds burglaries 3:05 p.m. Police arrest Everett man following shooting at Taco Bell 12:34 p.m. Eagle Scout spent year researching Perrinville Snohomish County is eager for federal transportation dollars $675K to study train, boat, car bottleneck at Edmonds Kids summer lunch program expands to Everett Front Porch: Public meeting set for levy
Our new comment system is not supported in IE 7. Please upgrade your browser here.