Ukrainian President Petro Poroshenko said Russia should "shut up and go away".
The corresponding comment was posted on the president's official Twitter account.
"The Kremlin's 'chemical attack' in the UK is nothing but an encroachment on British sovereignty. And our message to Russia is the same as that of British defense secretary Gavin Williamson: 'shut up and go away'," Poroshenko wrote.
Read alsoBBC: Putin most likely behind spy poisoning – JohnsonAs reported earlier, Gavin Williamson has urged Russia to “go away and shut up” when asked how the Kremlin should respond to the expulsion of 23 of the alleged spies from among their diplomatic corps in Britain.