The shooting was reported about 11:30 p.m. in the 11000 block of Aqua Vista Street, according to the Los Angeles Police Department.
Authorities say a 47-year-old man shot and killed two men in their late 60s. The suspect, who was related to one of the victims, then walked into the living room and used a shogun to take his life.
According to investigators, the incident may have stemmed from a domestic violence incident though the motive is still under investigation.