Opinionated TVNZ host Mike Hosking is under the state broadcaster's spotlight after an editorial spiel caused offence.

Seven Sharp last week ran an item about the abuse meted out to New Plymouth mayor Andrew Judd, after he proposed a Maori ward on the local council.

After the report, Hosking added his own opinion on the matter.

"Sad to say I'd never personally attack him obviously but he's completely out of touch with middle New Zealand," he said.

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"There's nothing wrong with Maori representation on councils cause any Maori that wants to stand for a council is more than welcome to do so and you can sell your message and if you're good enough you'll get voted on."

A TVNZ spokesperson said in a statement today a formal complaint had been laid against Hosking and it would be reviewed by a committee.

"In terms of the dialogue between colleagues, there has been some discussion about this piece as you've seen -- robust conversation and differing viewpoints are not unusual in the current affairs environment," said the spokesman , in a statement to RNZ.

Hosking's comments have been criticised by colleagues Miriama Kamo and Scotty Morrison.