A car fire that caused traffic delays on State Highway 29 in the Lower Kaimai area this morning is not being treated as suspicious, police say.

A police spokesman said emergency services were called to the scene near Kaimai Cafe close to Thorn Rd about 9.55am.

There were no reported injuries and the car had been partially blocking one lane. Police helped with traffic management.

A Fire and Emergency NZ spokesman said one fire crew was called to the scene at 9.30am.

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He said there were no surrounding people or properties at risk and the fire had been contained.

The scene had been left with police, he said.

Renee Doddrell from Kaimai Cafe said she saw the car on her way into work this morning.

"There was lots of smoke. The traffic is backed up heading towards Hamilton."