WASHINGTON -- D.C. police need your help locating a critically missing teenager. 

Police say 16-year-old Shamara Mercer was last seen in the unit block of K St., Northwest on Friday

Mercer is described in a police report as a black female, medium complexioned, 5-feet-7 inches tall in height,130 lbs, with black hair and brown eyes.

Anyone with information on the whereabouts of Joyce Zelaya should call police at 202-727-9099.