A third person - a 41-year-old man - has also been charged with murder and appeared in the Invercargill District Court yesterday.
Police said yesterday scene examinations were continuing at two addresses and the police investigation was ongoing.
At today's court appearance the man - like his co-accused - was granted interim name suppression and remanded in custody until his next date in the High Court at Christchurch.
All four will appear together for the first time on February 4.