A tour bus transporting 25 students has crashed at Williamstown, north-east of Adelaide.

The vehicle rolled and almost ended up in a river while passengers made a lucky escape out of the back window.

Nathan Parks from SA Ambulance Service said it was a “confronting” scene.

Williamstown minibus crash
A tour bus transporting 25 students crashed at Williamstown, north-east of Adelaide with the vehicle rolling down an embankment and into a creek bed. (9News)

“We had 25 people on board the bus, and when the first ambulance crew arrived people were still climbing out the back window,” Parks said.

“It could have been a very different outcome when you look at the bus down the embankment.”

The bus was full of passengers when it left Humbug Scrub road, just outside of Williamstown, and rolled at around 9.30am today.

A 21-year-old man was rushed to hospital with neck and spinal injuries.

Williamstown minibus crash
The bus was full of passengers when it left Humbug Scrub road, just outside of Williamstown, and rolled at around 9.30am today. (9News)

The other passengers all escaped unharmed.

The bus company, JC Minibuses said it had hired the vehicle out to the group and the driver wasn’t an employee.

“[We are] just really happy that we don’t have any more injuries here, and what we will do now as a company is we will support the renter,” operations Manager JC Minibuses said.

Williamstown minibus crash
The bus company, JC Minibuses said it had hired the vehicle out to the group and the driver wasn’t an employee. (9News)

9News has been told the tour group had come from the city and were planning to visit the Whispering Wall tourist attraction ten minutes away.

Emergency services say thankfully everyone onboard was wearing a seatbelt.

You May Also Like

Rachael was diagnosed with cancer… a truly despicable response from conspiracy theorists has forced her to sleep with a knife under her pillow

A citizen of the year has fought to clear her name after…

FBI Fires Agents Who Kneeled at George Floyd Protest

The FBI has fired about 20 agents who were controversially photographed…

Tributes flow for 'loving' teen killed in targeted machete attack

WARNING: Aboriginal and Torres Strait Islander readers are advised this story contains…

Painting set to raise money for newborn intensive care stolen from gallery

A painting dedicated to the late daughter of two The Block stars…