Police said they received a call about a stabbing around 1:30 p.m. Saturday. When they arrived, they found a 47-year-old man on the sidewalk in front of an apartment building on the 900 block of Mariposa Street.
The victim was taken to a local hospital, where he later died of his injuries. Authorities arrested the man's 55-year-old wife. Her name was not immediately released.
Investigators said a knife was recovered at the crime scene. The motive for the stabbing has not been determined. According to detectives, the couple lived together at the apartment complex.
Anyone with information was asked to call the Los Angeles County Sheriff's Department's Homicide Bureau at (323) 890-5500.