UPDATED 7.43AM: State Highway 29 over the Kaimai Range is being closed this morning.

The closure is to allow contractors work to remove containers which have fallen from a truck this morning.

"Diversions will be put in place soon," say a police spokesperson.

Several containers have fallen off a truck and are blocking the westbound lane, roughly five-hundred metres south of the summit.

Witnesses report that ICB's have fallen off a truck on both sides of the road, on the Matamata side of the summit.

The containers on the side of the road. Supplied photos.

UPDATED 7.19AM: Police are responding to an incident on State Highway 29 on the Lower Kaimai Range.

Several containers have fallen off a truck and are blocking the westbound lane, roughly five-hundred metres south of the summit, says a police spokesperson.

"There will be significant traffic delays as contractors work to remove the containers.

"Motorists are advised to avoid the area if possible."

EARLIER:

Reports are coming in of what witnesses are describing as truck losing some of its load on State Highway 29.

A caller to the 0800 SUNLIVE news hotline says a truck has dropped about five pallets of some sort of liquid, near the passing lane by the Kaimai Summit.

"People should expect delays. Firefighters are at the scene."

The caller says it doesn't appear to be a crash, as it looks like no other vehicles are involved.

Waka Kotahi Transport Agency is advising people to pass the scene with care.

"Due to an incident between the Kaimai Mamaku Lookout and Old Kaimai Road, people should expect delays and follow the direction of emergency services onsite."

Google's live traffic reporting is showing delays on the Matamata side of the Kaimai Range.

SunLive is working on getting more information and will provide an update when we can.

At the scene?

Call 0800 SUNLIVE or email photos to newsroom@thesun.co.nz