Polish authorities in the town of Lodz have launched an official investigation into the closure of Bitcurex, a Bitcoin trading platform that closed earlier this year. The timeline of events that led to the closure is complex and spans six months. First signs of trouble appeared on October 13, 2016, when the platform shut down without any kind of explanation. A few days later, a message appeared on the portal’s homepage, announcing issues with an update, also asking customers to be patient [mirror]. The message was replaced by another, blaming the downtime on “external interference in automated data collection and processing of information”””
Source: https://www.bleepingcomputer.com/news/security/polish-authorities-confirm-hack-of-bitcurex-bitcoin-exchange-launch-investigation/