In 1929, two of its members (Serhiy Yefremov and Mykhailo Slabchenko) and 24 corresponding agents (such as Osip Hermaize, Hryhoriy Holoskevych, Andriy Nikovsky, and others) were arrested in accusation to belonging to the non-existing (as later it was established) Union for the Freedom of Ukraine. None of the arrested have ever been released.