Along with the arrests, four firearms were also seized and a quantity of methamphetamine and cannabis recovered, Gaskin said.
One of those arrested has been charged in relation to an aggravated robbery last month.
The 24-year-old man has been charged with aggravated robbery, demanding to steal, conspire to deal methamphetamine, two counts of sale and supply of methamphetamine and three counts of unlawfully carrying a firearm.
He appeared in the Timaru District Court yesterday and has been remanded in custody until November 23.
A further nine people face 51 charges on drug and firearm offences and have all appeared before the Timaru District Court over the past two days.
Seven of these people - two women and five men - have been remanded in custody.
Two people arrested today are yet to appear in court.