Police are hunting a man who removed a quad bike from the scene of a crash which left the 29-year-old male rider badly injured.

The rider was trapped beneath the vehicle which overturned close to a junction on Harrogate Road in Thorpe Edge, Bradford, just after 5pm on Saturday.

A man took the quad bike from the scene making off in the direction of Ravenscliffe.

The rider was taken to Leeds General Infirmary. Any witnesses or anyone with information about the vehicle or the man who took it, is asked to contact the Western Area Roads Policing Unit on the non-emergency number 101.