A missing 11-year-old from Manor Lakes could be lost in Geelong, according to police.
Police on Thursday morning appealed for public assistance to help locate missing girl Sienna Johnson.
The 11-year-old was last seen leaving her residence at Manor Lakes on Tuesday evening about 11.30pm, police said.
Police have concerns for her welfare due to her age.
They described Sienna as about 130cm tall with a thin build, brown eyes and fair-blonde hair.
It is not known what she was last wearing.
Police released an image of Sienna in hope someone recognised her and could provide information on her whereabouts.
She is known to frequent the Watsonia, Fawkner and Geelong areas.
Police urged anyone who sights Sienna or who knows of her whereabouts to phone Werribee Police Station on 9742 9444.