A man was dropped off just before 2am at a petrol station in the South Canterbury town with a gunshot wound, police said.
A woman was admitted to hospital “with similar injuries around the same time believed to be from the same incident”.
A vehicle has been seized, police say, and will be examined.
A scene examination is underway at a motel on Evans St “where the incident is understood to have taken place”, police say.
“Police are working to understand what has happened and engage with those involved,” a police statement says.
“If anyone has information relating to this incident, please call Police on 105 and quote 231222/9424.”
It comes after a man was fatally stabbed in Christchurch in the early hours of this morning, sparking a homicide probe.
