An elderly woman involved in a car crash in Rangiora this morning has died.

The 85-year-old was initially taken to hospital in a critical condition following the crash on Flaxton Road just before 11.30am.

Police said just before 4pm today she had since died from her injuries.

An elderly man is in a serious but stable condition and three other people have been treated for minor injuries.

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Officers from the Serious Crash Unit are now investigating the circumstances of the crash.