Police are investigating two robberies that occurred in the Elizabeth area overnight.

The first occurred at about midnight, when the 19-year-old victim got off the train at Broadmeadows Railway Station and was approached by a man who demanded his wallet.

The victim was assaulted and had his wallet stolen, before the suspect left on foot with two other men.

The suspect is described as a man of Caucasian appearance, 180cm tall, aged about 20 years, with short black hair, light facial hair and brown eyes.

He was wearing a black shirt, dark blue jeans and white sneakers.

At about 2.30am, a 20-year-old man was walking along Midway Road at Elizabeth East when a man yelled out to him.

The victim started running, but the man caught up and assaulted him before stealing his wallet.

The suspect fled on foot through a nearby reserve.

He is described as Caucasian, 180cm tall, medium build, aged in his mid 20s, blonde hair and wearing a grey hooded jumper.

Elizabeth Police are investigating these robberies, which do not appear to be linked.

Police ask anyone with information that may assist the investigation to contact BankSA Crime Stoppers on 1800 333 000 or online at