Update 11.45am: Five people have been injured, two seriously after a four car crash in Tauranga this morning.

One person was trapped and had to be cut out of the vehicle on State Highway 29A, near the Maungatapu Bridge.

Emergency services work on one of the vehicles involved in this morning's crash. The engine block from one of the vehicles can be seen lying in the middle of the road just to the left of the fire engine. Photos: Chris Callinan.

A St John Ambulance spokesperson says two people were seriously injured and three others suffered minor injuries.

Earlier update 11.09am: At least one person has been seriously injured in a multiple car crash near the Maungatapu Bridge, Tauranga this morning.

A reporter at the scene says the crash scene was littered with debris and the engine block from one vehicle was left lying in the middle of the road.

Northern Fire Service Communications shift manager Daniel Nicholson says one person has be extricated from a vehicle and the patient was in a serious condition.

A police communications spokeswoman said the road (SH29A) was blocked from both directions and police were putting diversions in place.

Earlier Update 10.50am: Police Serious Crash Unit are investigating the cause of a multiple car crash on State Highway 29A, Maungatapu, Tauranga.

The crash which involved four vehicles happened just before 10.30am, on the BayPark side of the Maungatapu Bridge.

Emergency services had to free one person who was trapped in a vehicle and there have been multiple people injured in the incident.

The New Zealand Transport Agency says the road has been closed on SH29A Maungatapu and to avoid the area or use an alternative route.

Update 10.35am: Traffic is being diverted from a crash near the Maungatapu Bridge, State Highway 29A.

A witness has contacted SunLive to say police are turning traffic away from a serious crash on the BayPark side of the Maungatapu Bridge.

The witness told SunLive he could see only one vehicle but was unsure if other vehicles were involved.

'It's a silver car it's been bashed in the front and in the back. It's a mess. I was about 10m from the crash and police have got traffic to turn around and head back the way they came.”

SunLive understand both lanes are closed and Police are setting up diversions. But motorists are advised to stay clear of the area.

It's understood at least one person is trapped in the vehicle and there are possibly multiple people have been injured.

The Serious Crash Unit has been called to the scene.

Earlier 10.25am:

Emergency services are rushing to a crash near the Maungatapu Bridge State Highway 29A.

SunLive understands at least two vehicles are involved and the incident is on the BayPark side of the bridge near the bridge.

A witness says both lanes have come to a standstill. SunLive understands there have been injuries.

SunLive will bring you more information soon.

If you have information please call 0800 SUNLIVE or email photos to newsroom@thesun.co.nz.