Three men have been arrested after a series of early-morning raids on Christchurch properties linked to the King Cobras.
The arrests on Friday morning after three serious assaults in Christchurch CBD in March - one of which left a young father with what is likely to be a lifelong brain injury.
The addresses targeted include the Snake Pit Boxing Gym in Middleton, a public boxing and mixed martial arts facility which doubles as the King Cobras' gang pad.
The three men arrested will appear in the Christchurch District Court on Friday, facing charges relating to the assaults and participation in an organised criminal group.
Detective Senior Sergeant Colin Baillie says enquiries are continuing and more arrests are likely.
The assaults - which appeared to be unprovoked - took place at 3am on March 21 outside Cruz Bar, on Victoria St in Christchurch CBD. Police were forced to break into the venue with a search warrant to view CCTV footage of the incident.
Det Snr Sgt Bailie said the victims of the assaults were "innocent members of the public simply having a good night in town with friends".
"One of the victims, a young father, suffered a serious brain injury and will likely have lifelong injuries due to the assault," he explained.
"Police would like to thank those brave members of the public who intervened on the night of the assaults and those have come forward with information.
"The central city streets are for all members of the public to use and police will thoroughly investigate any criminal wrong-doing including organised crime."
Anyone who witnessed the assaults or has more information on them is urged to call police on 105 and quote file number 210321/2258, or anonymously contact Crimestoppers on 0800 555 111.
