A large-scale rescue operation is underway after two hikers became stuck inside a canyon overnight at the Blue Mountains.
Police say at about 2am, an Emergency Position Indicating Radio Beacon (EPIRB) was activated in distress.
NSW Ambulance then dispatched a rescue helicopter just before 3am and crews on board noticed a light source emanating from the Claustral canyon at Mount Tomah, about 50 km from Katoomba in the Blue Mountains region.
It has since been confirmed that two people are stuck inside the canyon, a 41-year-old man and a 33-year-old woman.
They are believed to be suffering minor injuries.
Police and ambulance rescue crews are abseiling into the canyon and a NSW Police spokesperson told NCA NewsWire the operation was expected to take considerable time.
More to come.