Emergency services were called to the crash on the Twizel-Omarama Rd about 12.30pm. Photo supplied

A man has died after a ute towing a caravan rolled near Omarama this afternoon.

Emergency services were called to the crash on the Twizel-Omarama Rd (State Highway 8) about 12.30pm. No other vehicles were involved.

Senior Sergeant Jason McCoy, of Oamaru, confirmed that a man was killed. St John ambulance said another person suffered moderate injuries.

Snr Sgt McCoy said inquiries were continuing and witnesses were being spoken to.

Any witnesses who had not made themselves known to police were asked to contact the Oamaru Police Station.

The crash happened on State Highway 8 and part of the road has been closed. Photo: Kayla Hodge

A Fire and Emergency New Zealand spokesman said crews from Omarama and Twizel were called to reports of a ute towing a caravan which had rolled and helped free people who were initially trapped.

State Highway 8 is down to one lane under traffic management, 2km south of the intersection with Lake Ohau Rd. 

Traffic control in place following the crash. Photo: Supplied

Part of the road was expected to remain closed for some time and motorists should expect significant delays.

Police asked people to continue to avoid the area and consider delaying travel.