Emergency services have treated a man after a truck and car collided in Blacktown at the intersection of Bungarribee and Reservoir Roads.
A police spokesperson told the Triple M emergency services responded to a call at approximately 4:30pm this afternoon.
Paramedics are believed to be treating a man, age unknown, who was trapped in a vehicle at the scene.
There are no reported fatalities, while the intersection remains closed.
Police say the truck driver has been taken to Westmead Hospital for routine testing.