A search has resumed today for missing Sylvania teenager Cassie Olczak.
On Wednesday NSW Police launched a massive search in bushland in the Royal National Park with help from PolAir, the dog unit and volunteers from the SES and Rural Fire Service.
The search was expected to resume at 8am this morning.
It comes as NSW Police release the last images of Cassie as she left Waterfall station.
The images show her walking along the platform and into the station car park.
She was wearing a black hooded jumper and had headphones in.