Police in Wellington are searching for a man seen riding a dirt bike while carrying a baby on his back.

The man, thought to be in his 30s, was spotted by a police officer at Ascot Park, in Porirua, today.

The motorcyclist was not wearing a helmet and had an infant in a baby-carrier on his back, police said.

The officer - who was on foot - attempted to wave the motorcyclist down, but he fled towards Conclusion St.

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Porirua Police are now appealing for witnesses or anyone who may know the man to contact authorities.

He is described as Caucasian with short blonde hair.

"Porirua Police need to identify this person due to his actions and safety concerns,'' police said.

Porirua East residents, Today a Police Officer on foot witnessed a male riding a white dirt bike at Ascot Park, Porirua...

Posted by Wellington District Police on Tuesday, 31 January 2017