Two more arrests have been made over the vicious Mangere dairy robbery.
Police have now arrested all four men alleged to have robbed the Kingsford Superette in Mangere on Tuesday evening.
A 17-year-old and a 20-year-old were arrested last night and now a 15-year-old and an 18-year-old have been charged with aggravated robbery.
All four were due to appear in the Manukau District Court today.
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Shocking security footage of the violent attack on a shopkeeper was released yesterday.
Police today thanked the community and media for their help with the investigation.
Police said four masked offenders stormed the shop near closing time, striking a worker on the head and holding a knife to his throat.
Others in the group allegedly stole cigarettes before fleeing.