The international hacker group Head Mare has gained access to the internal servers of a Russian company engaged in the construction of special military facilities.
According to the group's Twitter page, the files include a plan to relocate the 41st Missile Boat Brigade in occupied Crimea.
The plans of the reserve command posts Fauna and Vega, which are used to accommodate Russian officers, have been leaked to the public.
The hackers probably took advantage of a vulnerability introduced by the Russian company IntarmIT, which provides programming and equipment configuration services for the department.