One person was taken to hospital after a milk tanker crashed and fell off the Rakaia River Bridge.
A car and milk tanker collided on the bridge in Canterbury just before 6:30am.
The truck is half off the bridge and a heavy crane is needed to remove it.
Police said the road was completely closed and diversions were in place.
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Advertise with NZME.A Fire and Emergency communications spokesman said there was no spillage of milk into the river.