Hundreds of servers designed to mine bitcoin have been stolen in Iceland, and authorities have been unable to track down a single system. The missing hardware includes 600 graphics cards, as well as 100 processors, 100 power supplies, 100 motherboards, and 100 sets of computer memory. Law enforcement is hoping for an energy surge somewhere, as they appear to be out of leads. According to The Associated Press and Visir, those are the items a coordinated group of Icelandic thieves has stolen. And though 11 people have reportedly been arrested and at least two are still in custody, none of the stolen computers have yet been found by police.

The thefts, which occured between late December and early January, were reportedly captured on surveillance cameras by Advania, the server company hit by two of the three thefts. (The graphics cards, processors and so on were allegedly stolen from a home.) Advania had been offering its customers access to bitcoin-mining rigs, and it sounds like those were the type that were stolen. The Associated Press reports that the stolen computers are worth nearly $2 million.

The AP reports that police are tracking energy consumption across Iceland in case the thieves turn on their new computers and place a strain on the grid, since that could potentially lead them back to the stolen computers' location.