Having made clear this morning that:
"We have certainly heard the ultimatum voiced in London," Russia's top diplomat Sergey Lavrov said.
"The spokesperson for the Foreign Ministry has commented on our attitude to this," he added referring to Maria Zakharova branding of May's appearance in Parliament as a "circus."
Russia faces warning from Germany too, as Reuters reports Merkel and May spoke this morning about the nerve agent attack. Merkel condemned the attack and stated that she was "taking very seriously the British government's view that Russia might be responsible." Merkel then said Russia "needs to give prompt answers to the British' justified questions."
But then, Interfax reports Russian Foreign Ministry Spokeswoman Maria Zakharova turned up the heat dramatically, warning (or threatening):
"One does not give 24 hours notice to a nuclear power" adding that the "Skripal poisoning was not an incident but a colossal international provocation."