Long Beach police rescued a 15-year-old girl and arrested a man and woman on suspicion of human trafficking after pulling a car over during a routine traffic stop, authorities said Monday.

On Feb. 6, police made a traffic stop for a vehicle with no license plate near Pacific Coast Highway and Lemon Avenue. The driver, Reson Richard, 27, did not have a driver’s license, was on supervised release from incarceration and is a registered sex offender, police said in a statement.

The passenger, Samantha Davis, 21, had an outstanding warrant for prostitution.

Officers noticed a young girl was sitting in the back seat, and vice detectives later determine she was a runaway from a placement home in Simi Valley who was being trafficked, LBPD said.

The girl has been released into the custody of the Department of Child and Family Service, authorities said.

Richard and Davis are being held on $150,000 bail. The case is expected to be filed with the Los Angeles County District Attorney’s Office Tuesday, police said.

Anyone with information regarding this investigation is urged to call the Long Beach Police Department’s Vice Investigation Detail at 562-570-7219. Anyone wishing to remain anonymous may submit a tip through “LA Crime Stoppers” by calling 1-800-222-TIPS (8477), downloading the “P3 Tips” app to your smartphone (available at the Apple App store and Google Play), or visiting www.lacrimestoppers.org.