A video has surfaced showing a security guard punching a man unconscious outside a bar in central Auckland, Stuff reports. The video shows the man in a verbal argument with security guards outside Mexican Cafe on Victoria St West. As the man moves closer to the guards, one appears to punch him in the face and knock him to the ground. Detective Senior Sergeant Steve Anderson confirmed police were investigating the “serious assault”, which happened in the early hours of the morning on February 27. Anyone with information about the incident or who may be involved, is encouraged to contact police on 105 quoting file number 210227/7884 or call Crimestoppers anonymously on 0800 555 111.