Update 4.55pm: Police have now lifted a lockdown on a Christchurch school in the suburb of Woolston after police responded to an incident.
Gould Crescent was cordoned off just after 3pm and Bamford Primary School has been put into lockdown.
Residents reported parents waiting to pick up their children are being made to wait outside the barrier.
The nature of the incident can't be discussed for legal reasons.
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