A coach driver has been arrested in connection with a fatal crash in Wan Chai that saw an elderly woman die after being hit and trapped under the vehicle.

The police said the incident happened at around 10am on Friday as the man, 62, was driving the vehicle along Wan Chai Road.

"When approaching the junction of Wan Chai Road and Cross Street, the coach reportedly knocked down an 86-year-old female pedestrian," the force said.

"The female pedestrian was trapped under the coach and subsequently rescued by passersby.

"Sustaining serious multiple injuries, she was rushed to Ruttonjee Hospital in an unconscious state and was certified dead at 10.42am."

The driver was apprehended on suspicion of dangerous driving causing death.