Two women lost in Royal National Park found by police while Cassie Olczak still missing.

Two women who spent the night missing in NSW’s Royal National Park have been found by police.

Nicki Groves and Kate Bateup phoned National Parks at Wildlife Services to report themselves lost at roughly 2pm yesterday, after wandering down an unknown walking track near Waterfall Railway Station.

Officers lost contact with the pair soon after, sparking a search that was resumed this morning after being suspended at around 8pm Wednesday evening.

The 21-year-old friends were found by police this morning, and reportedly returned to the search command centre at around 10:30am.

According to a Tweet by NSW Police, they are currently being treated by paramedics.

The search for the women coincided with that being conducted for missing 16-year-old Cassie Olczak. Police today continued to comb the same National Park in search of the teen, who disappeared four days ago.

Olczak was last captured on CCTV at Waterfall Station at 7:40pm Sunday, after boarding a train from Banskia in Sydney’s south.