Actions of the participants in the Donbass trade blockade is an obstacle for the introduction of additional EU sanctions against Russia. This is what Deputy Head of the Presidential Administration Konstyantyn Yeliseyev said in the air of "Hromadske Radio" ("Public Radio". He explained that the sanctions envisage two stages: the first one - a warning about the responsibility of Russian business and militants in case of raider seizure of Ukrainian enterprises. The second stage - if a raider seizure happens- introduction of point sanctions against, above all, the Russian business or intermediaries. Konstyantyn Yeliseev added that it is quite realistic to achieve such agreements, but for this it is necessary to do"something to solve this blockade."