Police say a man in his 30s was stabbed several times near Daniel Place NE and Lake City Way just before 9 p.m.
The man was taken to a Harborview Medical Center in critical condition, according to Det. Mark Jamieson with the Seattle Police Department.
Jamieson said police have the accused attacker in custody.
It's unclear what led up to the stabbing or if the two men knew each other.