Ukrainian authorities said Tuesday that they have arrested two officers in the agency responsible for protecting senior government leaders and accused them of developing a plot to assassinate President Volodymyr Zelensky and other top Ukrainian officials — as a “gift” to Russian President Vladimir Putin for his inauguration.

The two suspects were colonels in Ukraine’s State Protection Department, roughly the equivalent of the U.S. Secret Service, and were recruited by Russia’s Federal Security Service, the FSB, according to Ukraine’s State Security Service.