At about 6.30pm last night, a man allegedly committed a lewd act towards a woman while on a bus travelling along Argyle Street, Parramatta.
Police have now released images of a man who may be able to help with their investigation.
The man is described as being of Caucasian appearance, aged in his 50s or 60s, with grey-white hair.
At the time, he was unshaven.
