An Ottawa woman was robbed while at a Royal Bank ATM on Saturday night.

She went to the Elmvale machine around 8:30 to take out money. After she completed the transaction she was held up by a man with a knife.

The suspect is described as white and between 18 and 20 years old. Police say he was wearing a black hoodie, white ball cap and white running shoes at the time of the incident.

Anyone with information is asked to call police.