Officials said the three injured were adults who were all inside the car.
The accident occurred just before 5:05 p.m. Friday at Sonora Avenue and San Fernando Road.
Police were called to the location around 9:50 p.m.
Searchers will be back on the hunt at daybreak.
KCAL9’s Stu Mundel reports Los Angeles City Fire Department personnel were called to the scene in the 5000 block of Hollywood Boulevard Monday afternoon following a report of a drowning.
The police department is asking for any witnesses to contact them.
The victims were taken to Providence Holy Cross Medical Center in Mission Hills.
Julio Sanchez was transported to Victor Valley Hospital Sunday, and was last seen voluntarily leaving the facility Monday at approximately 9:35 a.m.
SKY9’s Stu Mundel reports the multi-vehicle crash occurred at Vincent Avenue and Cypress Street Wednesday evening.
Officials said all four injured were transported to a nearby hospital.
Qaneak Shaney Cobb, 33, made her first court appearance Tuesday, three days after she was arrested following the crash in Sun Valley that critically injured an officer.
Six people were injured — two critically — during a three-vehicle crash in Northridge Sunday afternoon.
The event was called “Bark for Bruno” and man and beast alike came to support the 7-year-old German Shepherd.
Two people were killed and a teenage boy was injured Sunday when a car crashed into the backyard of an Anaheim home.
The gunman remains at large, said authorities.