UPDATE: Bree has been located safe and well.
Mandurah Police are urgently seeking information from the public to help locate Bree Ann Newsome.
The 15-year-old is believed to be wearing black leggings and a light coloured t-shirt.
There are serious concerns held for her welfare as she is without vital medication.
Anyone with information on her whereabouts or who may see Bree is asked to contact police immediately on 131 444.
LISTEN: WA Police release triple-0 call from shooting murder of bikie boss Nick Martin at Kwinana Motorplex
Police pursuit comes to crashing end in East Rockingham
Tensions boil over in Rockingham council chambers as motion to reinstate weekly red bin collections is defeated
WA's first public National War & Service Animal Day commemoration to be held at Dawesville War Memorial
New road safety laws to be named in memory of Furnissdale hit-and-run victim
UK nuclear submarine docks at Rockingham's HMAS Stirling
Rockingham Police ask for public's help to find copper cable thieves
Woman dies in Bunbury motorcycle crash
International chef Diana Chan announced as Mandurah Crab Fest culinary ambassador