A person has died and another has been critically injured, in a crash involving two vehicles on Old West Coast Road in West Melton.

The road was closed while emergency services responded to the crash, reported at around 11.15pm on Monday.

One person died at the scene and one person was transported to Christchurch Hospital in a critical condition.

The Serious Crash Unit has completed a scene examination and the road has re-opened.

Enquiries into the circumstances of the crash are ongoing.