The state border service of Ukraine introduced enhanced surveillance regime on the border with Donbas and the Crimea, which will last until the end of may holidays, said on Thursday the assistant to the head of the Agency Oleg Slobodyan. As said Slobodyan, the limits will apply to " stay, movement and implementation of various types of economic activity, as well as among them the release of small boats in the sea ". "All events are held openly and in close cooperation with security Service of Ukraine, Ministry of interior, the national guard, the armed forces and other police. The main goal of gain is to prevent provocations against peaceful residents, minimizing the risk of penetration of terrorists, terrorists, firearms and other means of sabotage ", - quotes the words of Slobodyan Ukrainian Agency " LigaBusinessInform ". Slobodyan said that increased surveillance of the border is valid from 27 April until the end of may holidays.