Desperate search for 14-year-old girl injured after disappearing from home

A desperate search is underway for a missing 14-year-old girl south of Adelaide.

Lily was last seen in Pasadena at around 12.45pm on Thursday and may have travelled towards Adelaide Parklands.

The teenager, who has dark blonde or orange hair, may have her arm in a sling.

She was last seen wearing a dark blue sweater and pants.

A rescue helicopter has joined the search, which has been flying over the Onkaparinga River Recreation Park and west to Port Noarlunga.

Lily is white and approximately 153 cm tall.

Anyone with information is asked to call the police helpline on 131444.