9.02am:

Police are managing traffic at the Welcome Bay roundabout this morning as the traffic lights system is down.

Traffic remains clogged at Welcome Bay following a collision between two cars on State Highway 29 this morning.

A caller to bayofplentytimes.co.nz said she had been stuck in traffic since 8.10am, when she reached the Welcome Bay shops.

The woman has only just reached the roundabout now and said police were acting as points men to help manage the heavy traffic.

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8.44am: One vehicle has rolled down a bank, the other nosed dived down a bank in this morning's crash on SH29.

The two cars are about 300m south of the Hairini roundabout.

A reporter at the scene said the occupants of the car were being treated at the scene, before being transported to hospital.

He said the incident looked bad because one car was submerged in trees after it appeared to have rolled down the bank.

8.28: Patients involved in a collision on SH29 this morning remain down a bank.

Police Northern Communications Centre Inspector Ian Brooker said there were three patients with moderate injuries, one with a broken leg.

He was unsure if the vehicles involved had come from the Bay of Plenty Polytechnic or SH29.

Emergency services are still in the area trying to clear the scene after the crash which happened at 8.02am.

8.18am: A woman travelling to work this morning told The Bay of Plenty Times said she was stuck in traffic on Welcome Bay Rd.

The traffic was backed up beyond the Welcome Bay shops and she was currently not moving, she said.

Earlier: Emergency services are responding to vehicle accident in Hairini this morning.

It is understood the road is not blocked and traffic is flowing slowly in the area.

More soon.