![At least 10 killed in bus crash at Greta At least 10 killed in bus crash at Greta](/images/transform/v1/crop/frm/7daP3m9vD5jxj8khH4ayZs/b2cb8f41-b420-41cf-8134-c6b16011443f.jpg/r0_378_4032_2646_w1200_h678_fmax.jpg)
At least 10 people have died in a horror bus crash in the NSW Hunter Valley overnight.
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Emergency services were called to Greta near the Hunter Expressway off-ramp about 11.30pm on Sunday after reports a coach, reportedly transporting 37 people from a wedding, had rolled.
"Initial inquiries indicate 10 people have died," NSW Police said in a statement about 6am.
"Eleven people were transported to hospital via helicopter and road, and 18 passengers are uninjured."
Police said early on Monday those figures may be updated as their inquiries into the carnage.
The bus driver, a 58-year-old man, was taken to hospital under police guard.
![The road is closed in both directions. The road is closed in both directions.](/images/transform/v1/crop/frm/7daP3m9vD5jxj8khH4ayZs/4f41bd65-9248-4f56-9bba-12ad19443d22.JPG/r0_38_702_444_w1200_h678_fmax.jpg)
He will undergo mandatory blood and urine testing and assessment.
The crash site is now a crime scene, with specialist investigators from the Crash Investigation Unit examining precisely what caused the catastrophic incident.
Police said road closures and diversions through the area would be "protracted", and have established a marshalling area in Branxton.
Drivers are urged to check livetraffic.com prior to moving through the area.