According to Shane Stokes at Velonation, there has apparently been a massive raid in Italy, involving among other things the offices of one UCI ProTeam, rumored to be Katuysha. The linked story is just a very preliminary report, and there is no mention of how or whether this is connected to other investigations. Oddly, the targeted riders are supposed to be Russian riders living in Spain, but their records are apparently in the team's Italian offices.
Since much more is likely to develop on this, it seems worthwhile to have someplace to collect information as it becomes available.
Edit: Tuttobici story here. Not really any more info.
Edit 2: Cyclingnews have more details, and moderate things considerably.