A senior Ukraine presidential official said Ukraine has nothing to do with the alleged drone attack on the Kremlin, which Moscow said was a Ukrainian attempt on Russian President Vladimir Putin's life.

 "Ukraine has nothing to do with drone attacks on the Kremlin," presidential spokesman Mykhailo Podolyak wrote on Twitter. "Ukraine does not attack the Kremlin because, firstly, that does not solve any military aims."

He also said by doing so "Russia is clearly preparing a large-scale terrorist act" against Ukraine in the coming days.