The incident happened Jan. 18 around noon in the area of Santa Monica Boulevard and Edgemont Street, according to the department.
In the released footage, a woman is seen walking with two other people when a man approaches her from behind and stabs her twice.
That suspect, described as a 30-year-old man, took off running. Detectives are seeking the public's help in identifying him.
Meanwhile, the woman suffered non-life threatening injuries.