About 9:10 p.m., police received reports that three people were wounded by gunfire at Reseda Boulevard and Valerio Street, LAPD Officer Mike Lopez said.
Six people, at least one of whom is armed, are believed to be responsible for the shooting. One person had been detained as of 10:15 p.m., Lopez said.
Police have set up a wide perimeter in the San Fernando Valley neighborhood to locate the remaining suspects.
The three wounded people are expected to survive.
This story will be updated as more information becomes available.