Waterloo Police searching for missing mom & infant son

UPDATE: Shelby Wittenburg and her son have been found safe.
WATERLOO, Iowa (KWWL) -- The Waterloo Police Department is asking for the public's help locating a missing 25-year-old woman and her infant.
Shelby Wittenburg and her son were last seen in Waterloo on January 4th. Police say they were last known to be driving a white Volkswagen Jetta with no license plates.
Wittenburg is described as a Caucasian woman, 5'2" weighing 130 pounds. She has blonde hair and blue eyes. Anyone with information about where Wittenburg and her son may be is asked to call the Waterloo Police Department at 319-291-2515.