A police investigation is underway after a 59-year-old male pedestrian was seriously injured when a taxi mounted a pavement on North Castle Street at 1pm this afternoon.
The 61-year-old driver and a female passenger were also taken to hospital.
Police have closed the busy route between George Street and Queen Street.
A Police Scotland spokesman said: “Officers remain in attendance and North Castle Street is closed from George Street to Queen Street as inquiries continue to be conducted at the scene.
“Motorists are thanked for their cooperation and anyone who witnessed this, and has not yet spoken to officers, can contact Police Scotland via 101.”