Police looking into video that appears to show officer punching man

Police are investigating after a man was allegedly punched in the head during an arrest in Hamilton.

The footage, uploaded to social media, shows a man being pulled behind a car by police while others watch on.

Moments later, he appears to be hit in the face by an officer standing beside him.

A woman can be heard telling the man to resist.

Waikato District Commander Superintendent Scott Gemmell said a complaint had been made, and police were taking a closer look at the circumstances.