Police investigating after deaf man filmed being brutally attacked in Auckland CBD

Police have launched an investigation after footage of a deaf man being brutally attacked outside an Auckland CBD supermarket was posted to social media this week.

The assault was carried out on Tuesday afternoon outside Countdown on Victoria St West.

In a video posted to Facebook by a woman claiming to be the victim's sister, a man can be seen approaching him from behind before picking up a metal post and pushing it into his face with force.

"A police report has been filed but we are wanting to make sure that this person is held accountable for his actions! My brother was video recording himself before this person attacked!" she wrote.

"Please help share this so we can find out who this disgusting person is!"

Police say they are making enquiries into the attack.

"At the time the report was first made, the offender had already left the area and due to other demands in the area at the time, police were not immediately able to attend the scene," explains Auckland Central Police Inspector Marty Brown.

"This would have been an extremely distressing situation for the victim and a number of enquiries are already underway into this matter.

"Police have subsequently taken a statement from the victim and have obtained CCTV footage for further enquiries. Area enquiries were undertaken yesterday."

Insp Brown says police are working to increase visibility and foot patrolling in the city in response to concerns over anti-social behaviour and offending. 

"The area where this assault occurred is one area Police are focusing on," he said.

"Police encourage anyone who may have witnessed the assault or have information that may assist our enquiries to contact us. They can contact Police on 105 quoting the file number 211125/5883."