Marrickville, Sydney: Desperate search for missing girl Alexandra Green after she goes missing

Police are searching for a young woman who has been missing in Sydney for almost 24 hours.

Alexandra Green, 11, was last seen on Gladstone Road in Marrickville at around 1.20pm on Tuesday.

When they could not locate her, police were notified and officers began investigating her whereabouts.

Police and family are concerned for his well-being due to his age.

She is described as being of Caucasian appearance, about 160cm tall, with a slim build, shoulder-length brown hair and brown eyes.

She was last seen wearing a black hooded sweater, black biker shorts and black shoes.

Anyone with information about his whereabouts should call police or Crime Stoppers on 1800 333 000.