Missing teen believed to be in Rockingham or Baldivis

Police are urgently calling on the public's help to find a missing 17-year-old girl.

Natasha was last contacted by mobile phone around 5.17am on Wednesday, March 30.

It's believed she is in the Rockingham or Baldivis areas.

Natasha is described as 173cm tall, with a very slim build, long black hair and brown eyes.

She has a scar on left inner wrist in a half moon shape and a small spot on left upper lip.

It's not known what she is wearing however she usually carries a black canvas bag. 

Anyone with information on Natasha's whereabouts is urged to contact police on 131 444.