Five people have been injured after a truck collided with a car on State Highway 1.

Some are in a moderate condition while others face critical injuries, St John says.

The crash happened at around 10.05am near the Rotoaira Rd intersection in Taupō.

At least seven fire trucks, two ambulances and a helicopter attended the scene.

At 10.30am two people were trapped in their vehicles following the crash. One was stuck in a light truck while another was trapped in a car.

Firefighters have since been able to free both people.

A section of SH1 is closed and police are advising drivers to take an alternate route.

The Serious Crash Unit have been advised.

-Gabrielle McCulloch/Stuff.

EARLIER:

State Highway 1 in the Bay of Plenty Police District is closed following a serious crash.

Police are responding to a serious crash on State Highway 1, near the Rotoaira Rd intersection, Taupo.

"The road is closed and motorists are advised to take an alternate route," says a police spokesperson.

"Initial reports indicate occupants of the two vehicles are injured.

"The Serious Crash Unit have been advised.

"More information will be provided when available."