Bitstamp, a major bitcoin exchange, has temporarirly suspended services, reports the company’s official Twitter account.

A notice on Bitstamp’s website explains that services have been stopped for security reasons.

"As a security precaution against compromises Bitstamp only maintains a small fraction of customer bitcoins in online systems. Bitstamp maintains more than enough offline reserves to cover the compromised bitcoins. IN THE MEANTIME, PLEASE DO NOT MAKE DEPOSITS TO PREVIOUSLY ISSUED BITCOIN DEPOSIT ADDRESSES. THEY CANNOT BE HONORED!", says a message on the trading platform’s website.

BitStamp halted customer withdrawals in February 2014 when the exchange suffered from a denial-of-service attack. In November 2013, the exchange faced network/banking issues followed by customers' complaints about transaction services.

Around 5 a.m. GMT on January 5, several reddit users complained that Bitstamp was not allowing them to make withdrawals. They quoted the official notice from the trading platform, in which Bitstamp officials cited “technical problems”.

The Reddit user bjreporter has stated that Bitstamp also informed one of their clients, Coinfire, about certain technical problems. According to bjreporter, “this seems to be a server issue, not a compromise”.