Mystery surrounds a police operation in Christchurch this morning.
Police were called to an address on Trents Rd, Templeton, at around 6.30am today, police said in a statement - but they're not sure what for.
"Reports from witnesses are varied and police are trying to establish exactly what occurred, some have reported a firearms incident, others a motor vehicle crash," Detective Senior Sergeant Neville Jenkins said.
A number of people who were in the area at the time were being questioned, he said.
The scene has been cordoned off and a scene examination is being carried out.