THE BRONX - Police are asking for the public’s help in a search for a missing Bronx teen.

It’s being called a ‘special category’ missing person case because the girl is only 14 years old.

According to police, Sierra Rivera vanished on June 2.  She was last seen in the vicinity of 2170 White Plains Road near Pelham Parkway.

Police say Rivera is 5 foot 3 inches, and weighs 130 pounds.  She has brown eyes and brown hair.  She was last seen wearing all multi-colored clothes, including her sneakers.

According to the NYPD, Rivera suffered a head injury right before she went missing that impacts her walking.

Police say Rivera has never once ran away from home. 

Anyone with information is asked to call police.