Emergency services were called to the crash on Bridle Path Rd in Ferrymead about 3.10pm today.
A St John spokesman said an ambulance took the injured person to Christchurch Hospital.
Initial reports were that one person has been seriously injured, a police spokesperson said.
The road was closed and diversions were in place.
"Motorists should avoid the area and expect delays."
A rescue helicopter was sent to the scene, but has been stood down.