Police are following up alleged acts of indecency committed against girls on public transport in Weston Creek.

They are looking for a man who allegedly takes photos of girls while on the bus between Rivett, Woden and Civic.

He is described as Indian or Middle Eastern in appearance with a heavy build, straight grey and dark hair, and a grey beard.

Police also believe this man may have also been involved in the attempted sexual assault of a teenage girl in Rivett on Tuesday evening near Bangalay Crescent.

Know anything? Call 1800 333000 or via the Crime Stoppers ACT website.