Here are the latest developments:
An unknown number of people are still inside the store in the Silver Lake neighborhood hours after the gunman ran inside, police said.
-- The suspect was pursued by police after a shooting and ran into the Trader Joe's when he crashed his car, police said.
-- Eighteen ambulances and more than 100 firefighters are at the scene of the incident, Los Angeles Fire Department spokesman David Ortiz said.
Update, 9:45 pm ET: Suspect is in custody. One woman was shot and killed and all other hostages have been freed.