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Canterbury District Commander Supt John Price will provide an update on the Sockburn homicide and police shooting in Kaiapoi at 12pm on Sunday.
Two men are in police custody in Christchurch after the death of a woman in Sockburn on Saturday afternoon.
Emergency services were called to reports of a potential stabbing on Cheyenne St at 4:20pm.
In a different incident, a man was critically injured after being shot by police in north Canterbury's Kaiapoi on Saturday night.
On officers' arrival, the man allegedly "attacked the police vehicle with a metal bar", Price said.
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