A teenage boy was allegedly assaulted by a man in Jacka earlier this month.

Police say two teenage boys were walking along Appleford Avenue about 4.10pm on June 12 when a vehicle stopped nearby and the driver spoke to them.

The man then allegedly got out of the vehicle and assaulted one of the boys before driving away.

Police have now released a face-fit image of a man they believe may be able to assist with the investigation.

He is described as Caucasian in appearance, about 180cm tall, with long dark curly hair, facial hair and a facial tattoo.

Anyone who recognises the man or witnessed the incident is urged to contact police via the Crime Stoppers ACT website.

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