A man is dead and three people have been injured in a two-car crash on State Highway 1 in Canterbury.
The head-on crash happened north of Orari about 2.30pm.
Police said the deceased man was from Timaru.
Three people have been taken to Timaru Hospital to have their injuries assessed.
Police said no further details about the man would be released until next of kin had been informed.
Diversions were in place on SH1 at Racecourse Rd and Orari Station Rd and police said they would be in place for some time while police investigated the crash.
Police have asked the public to avoid the area.