Meanwhile, a spokesman for St John told the Herald they did not attend the incident.
Police are investigating an incident in Christchurch after a person voluntarily reported themselves to hospital with injuries.
They were notified of a "disorder incident" on Jarrow Pl in Halswell shortly before 11am, a spokesperson said.
One person was injured but police did not have confirmed details of the injuries at this stage.
"We are speaking to those involved," the spokesperson said.