The company said in a notice on its site that there had been "significant losses" but went no further, only saying that "once identified, the exchange was put into maintenance while we assessed damages".
Cryptopia was set up in July 2014 and is based in Christchurch. It has two directors, Adam Clark and Robert Dawson, according to Blockonomi, a site that covers cryptocurrencies, fintech and the blockchain economy.
We cannot comment as this matter is now in the hands of the appropriate authorities. We will update you as soon as we can.https://t.co/9uMiKQwb6u— Cryptopia Exchange (@Cryptopia_NZ) January 15, 2019
The police statement said they were trying to establish what happened and how the site had been breached.
The website Crypto News cited a tweet from the chief executive of Binance, another cryptocurrency exchange, as saying some of the funds stolen from Cryptopia had been frozen.
These funds had been moved to Binance by the individuals who carried out the hack.
Just checked, we were able to freeze some of the funds. I don't understand why the hackers keep sending to Binance. Social media will be pretty fast to report it, and we will freeze it. It's a high risk maneuver for them. https://t.co/i0PeahLzic— CZ Binance (@cz_binance) January 16, 2019
The police statement said: "While police are unable to go into details about specific steps being taken at this stage, we can say that our focus includes commencing both a forensic digital investigation of the company, and a physical scene examination at the building.
"We are dealing with a complex situation and we are unable to put a timeframe on how long the investigation may take.
"We are also aware of speculation in the online community about what might have occurred. It is too early for us to draw any conclusions and Police will keep an open mind on all possibilities while we gather the information we need."