AKIPRESS.COM - Uzbekistan-born Russian billionaire Alisher Usmanov was sanctioned by the European Union on Monday. Two days later, Forbes  has learned from three sources in the yacht industry that one of his prized possessions—the 512-foot yacht Dilbar, valued at nearly $600 million—has been seized by German authorities in the northern city of Hamburg.

The ship has been in the Hamburg shipyards of German shipbuilding firm Blohm+Voss since late October for a refitting job. Sources who spoke to Forbes said that the German government froze the asset and that, likely as a result, Blohm+Voss employees who had been working on the yacht didn’t show up to work on Wednesday. Representatives for Blohm+Voss and Usmanov didn’t immediately respond to a request for comment, Forbes reported.

Usmanov purchased Dilbar in 2016 for a reported $600 million from German shipbuilder Lürssen, which custom-built it for him over 52 months. The firm calls it "one of the most complex and challenging yachts ever built, in terms of both dimensions and technology." At 15,917 tons, it's the world's largest motor yacht by gross tonnage, and is typically manned by a crew of 96 people. Dilbar boasts the largest swimming pool ever installed on a yacht as well as two helicopter pads, a sauna, a beauty salon, and a gym. Its plush interiors have more than 1,000 sofa cushions and it can host up to 24 people in 12 suites.