Police have charged a man after three teenagers were allegedly approached, and one indecently assaulted, by a man in Belmont South on Saturday.

About 1pm (Saturday 18 April 2015), a 17-year-old girl was fishing with her two siblings – a boy and girl aged 14 – at Cold Tea Creek when a man approached them.

Police have been told the man spoke to the trio, before the teens returned to their vehicle in a nearby car park.

The man followed the teens, before he allegedly indecently assaulted one of the girls.

The teenagers drove from the scene and alerted their parents, who contacted police.

Officers attached to Lake Macquarie Local Area Command attended and commenced inquiries.

About 8.30pm yesterday (Sunday 19 April 2015), detectives arrested a 49-year-old man and he was taken to Charlestown Police Station.

He has been charged with one count of indecent assault of a person under 16 years and granted conditional bail, to appear at Belmont Local Court on 13 May 2015.