The website founder at the centre of an FBI-led investigation into online piracy has spent his birthday in jail.
Founder Kim Dotcom, also known as Kim Schmitz, turned 38 on Saturday, but celebrated in prison, instead of at the rented Auckland mansion where he lived.
He and three other men arrested on Friday are due to appear in court on Monday.
Police say Dotcom had an extravagant birthday party planned, which was why they knew it was a good time to make their move because his associates had flown in for the party, TVNZ reported.
Dotcom barricaded himself in a saferoom, with a firearm, when police raided the Coatesville mansion on Friday.
Dotcom barricaded himself in mansion
The four arrested men appeared in North Shore District Court on Friday, where Dotcom said he had nothing to hide.
They are among seven charged in a global sting on the internet upload site www.megaupload.com, which Dotcom founded. The FBI are working to extradite them to the US.
Megaupload has been taken offline and the company is looking into options to get back online.
The accused are Dotcom, a German national with New Zealand residency, Megaupload's chief marketing officer Finn Batato, 38, chief technical officer and co-founder Mathias Ortmann, 40, both from Germany, and Dutch national Bram van der Kolk, 29, who is also a New Zealand resident.
Political questions raised over Dotcom's residency
Police seized luxury goods and computer files from the mansion on Friday, which they are examining.
This included two firearms and a 55-year-old New Zealand man has been charged with unlawful possession of a pistol. He was released on bail and is due in court on January 26.
NZN