The Ukrainian Security Service (SBU) said that a Russian intelligence agent has been held in the town of Rivne.The spy, a Ukrainian citizen who permanently resides in Russia, was to recruit a senior officer from the headquarters of the Ground Force of the Ukrainian Armed Forces, the SBU statement says.In exchange for passing documents classified as 'secret' and 'top secret' , the GRU [Russian military intelligence] agent was to offer to a Ukrainian officer and his family Russian citizenship and money. The amount depended on the relevance and importance of the military secrets.Having received the offer of cooperation with the Russian secret services, the Ukrainian military officer turned to the SBU.