Thirty-three people were hurt in a bus accident in northern France's Somme on Sunday, including four people who were seriously injured.

Local police said the passengers aboard the Flixbus bus from Paris to London came from nine different countries.

A photo posted by the prefecture on its Twitter account showed the bus flipped to one side on the A1 motorway.

The accident happened at around midday (11:00 GMT) as the vehicle took a motorway exit, a police statement said.

Thirteen of the injured were French, eleven were from the UK, three from the US, two from Spain, and one each from Australia, the Netherlands, Romania and Russia. 

They were taken to hospitals in the region. 

Flixbus said it was putting in place an emergency number and would provide a replacement bus.

(Cover via Gendarmerie de la Somme Twitter account)