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One person has been killed in a crash on State Highway 1, Redwood Pass, this morning.
A second person reportedly has serious injuries.
Emergency services responded to a serious crash on State Highway 1, Redwood Pass, in Tasman.
The collision between two cars occurred at 6.50am between Redwood Pass Rd and Awatere Valley Rd.
The road was blocked but has now reopened.
Police are still asking motorists to take alternative routes where possible or expect significant delays.
"Police thank motorists for their patients and co-operation," a spokesperson said.