Update: Officers have arrested a 28-year-old man from Gloucester in connection with this incident.
He was arrested on suspicion of dangerous driving, failing to stop and two other driving offences.
A boy is currently in hospital following a serious collision in Gloucester earlier this afternoon (Monday 27 March) and officers are appealing for witnesses and information.
Police and the Ambulance Service were called at around 3.20pm today with a report of a collision between a motorcyclist and a pedestrian near to Falkner Street and Midland Road.
It is reported that the motorcyclist then put the boy on to his motorbike and drove him without a helmet towards Brunswick Road.
The motorbike is described as a blue Yamaha with the registration beginning RE71.
Emergency services attended and an 11-year-old boy was taken to Gloucestershire Royal Hospital with serious leg injuries where he remains.
The motorcyclist is believed to have been driving in a group with other motorcyclists.
Officers investigating the collision are keen to hear from anyone who witnessed the collision may and anyone who may have relevant CCTV or dashcam footage.
Anyone with information is asked to call police on 101 and quote incident 291 of 27 March.