EMERGENCY services are in attendance at a crash on Purton Road involving a motorbike and a horsebox.
The air ambulance was also scrambled to attend the accident.
The 7.5-tonne horsebox is not thought to have been carrying an animal.
The incident occurred shortly before 3pm and the top of Mead Way near Thamesdown Drive is closed. Surrounding roads are currently gridlocked so drivers are being asked to avoid the area.