At least 21 people were injured after a double-decker bus crashed into an exit ramp divider in Cheung Sha Wan on Thursday.

The Citybus service bound for the airport was travelling along the West Kowloon Highway, when it hit the divider at an off-ramp for Stonecutters Bridge at around 12:30pm.

Online footage showed the front of the bus severely damaged, with the lower deck windscreen shattered.

Police said nine men and 12 women, aged between 10 and 72, sustained minor injuries.

Those hurt were taken to Kwong Wah Hospital, Princess Margaret Hospital and Caritas Medical Centre for treatment.

The driver, 23, suffered head and limb injuries. He was later arrested on suspicion of dangerous driving, and has been released on bail.

Citybus expressed sympathy for the injured passengers on the A22 route, adding that it will fully cooperate with the police investigation.