One person has been seriously hurt after a two-vehicle crash in Christchurch.

The collision happened near the intersection of Main South Rd and Parker St at about midnight.

One of the vehicles involved rolled and hit a pole.

Firefighters had to free a person who was trapped in the wreckage, Fire and Emergency NZ spokesman Riwai Grace said.

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A St John ambulance spokesman said an ambulance and a rapid-response vehicle were sent to the scene and the injured person was taken to Christchurch Hospital.