It happened around 9:20 p.m. in the 2700 block of Santa Monica Beach, police said.
Officers responding to a call reporting a large party in the area heard multiple gunshots as the group began to disperse.
That's when they located the two shooting victims - a 14-year-old girl and a 17-year-old girl - both from Los Angeles, suffering gunshot wounds to their lower legs.
Both of the injuries were non-life threatening, authorities said.
Witnesses described the shooter as a man around 5'10" tall, with dreadlocks, wearing a black pants, white shirt, and black hat.
Anyone with information is asked to contact SMPD’s detective unit during business hours at 310-458-8451, or the Watch Commander (24 hours) at 310-458-8427.