Censor.NET reports citing first deputy head of State Fiscal Service Serhii Bilan on Facebook.
He said 430 employees of tax police are involved in the operation.
"We have initiated a large scale attack on spirit shadow market. At the moment, 41 distilleries are being raided. The special operation conducted by tax police with procedural guidance by Prosecutor General's Office is aimed at ending illegal activities in production and sales of excisable goods," Bilan wrote.
He said the shadow market of spirits production and distribution inflicts losses to Ukrainian state budget in amount of billions on hryvnia and poses threats to the population due to low quality of its products.