Two injured, one critically, in West Coast truck crash

Two people have been injured in the truck crash on the West Coast. Photo/ file

A person is understood to be trapped and critically injured following a truck crash on the West Coast this morning.

A helicopter is heading to the site on State Highway 65 (Shenandoah Highway), which is blocked near O'Sullivans Bridge.

The two trucks collided at 7am, police said.

SH65 Jnc of SH6 to Maruia - Crash - Road Closed - A diversion is in place. Take extra care. ^SM https://t.co/Jh3EhmprOS pic.twitter.com/qa1ySxuKtg

— Waka Kotahi NZTA Top of the South (@WakaKotahiTotS) September 18, 2017

The person with critical injuries will be taken to hospital by helicopter.

Another person has moderate injuries and is being transported to hospital by ambulance.

The road is expected to remain blocked for some time and traffic is being diverted at O'Sullivans Bridge.