COLUMBUS, Ohio (WCMH) -- Authorities are searching for a Columbus woman after an 8-day-old infant went missing. The child was last seen on Dec. 20 near Champion Avenue and Stewart Avenue in southeast Columbus and is believed to be with Rosetta Sullivan, described by the Columbus Division of Police as the infant's "non-custodial biological mother." Authorities said the child, a girl born on Dec. 15, is believed to be endangered due to health concerns. Additional details, such as Sullivan's height and age, were not provided. Police are asking anyone with information regarding the whereabouts of Sullivan to call the Columbus division's missing persons unit at 614-645-4624.