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Suspicions of poison and warnings to Russia over double agent's illness

Salisbury Cathedral early this morning, two days after Skripal was found unconscious. Photo: Dan Kitwood/Getty Images

U.K. counter-terror police have taken over the investigation into how former Russian double agent Sergei Skripal and his daughter Yulia became critically ill after exposure to a suspected toxic substance, with the government warning on Tuesday of “harsh consequences” if any state, including Russia, is found to be involved.

Why it matters: Russia is already under mounting pressure over rising evidence of the hybrid war — which includes cyberwarfare, disinformation, targeted assassinations and support for proxies fighting wars abroad — that it is waging against the West. If the Kremlin is found to be involved in the poisoning of the former spy on U.K. soil, the British government pledged to explore further sanctions on Russia, on top of those already being applied by the U.S. and the E.U. for the annexation of Crimea and fomenting of conflict in eastern Ukraine.