UPDATE (at 6.25pm):
RESERVOIR Road is now open again after a four-car crash at 3.55pm today.
The crash occurred near the Cooper Street intersection, about 100 metres south of Bungarribee Road.
A NSW Police media unit spokesperson said several people were treated by paramedics at the scene.
The spokesperson said one person was conveyed to hospital due to soft tissue damage.
The site has now been cleared and the road is open in both directions.