A man and woman will appear in court charged after an alleged indecent assault on a Casino woman last weekend.

On the afternoon of Saturday (30 January) a 23-year-old Casino woman met a 44-year-old man and a 42-year-old woman, both from South Grafton, at a licensed premises in Casino.

Police will allege that the three people went to a caravan park in South Grafton before the man and woman offered to drive the 23-year-old back to her home in Casino later in the evening.

As the trio drove towards Casino the 44-year-old man allegedly pulled the car into a camping ground at Lillydale and threatened the Casino woman.

The Casino woman was allegedly indecently assaulted before she was able to escape the man and woman by jumping into the nearby Clarence River.

The South Grafton man and woman fled the camping ground.

The 23-year-old sought help at a nearby home where police and emergency services were contacted.

A crime scene was established and police conducted a number of inquiries into the incident.

About 12.40pm yesterday (Sunday 31 January) Grafton police arrested the South Grafton man and woman in a car in Grafton.

They were taken to Grafton Police Station where they were questioned before both were charged with detain for advantage and three counts of aggravated indecent assault. The man was also charged with aggravated assault occasioning actual bodily harm.

Both were bail refused and will appear at Grafton Local Court today.