Kremlin denies any part in incident, which German Chancellor Merkel called attempted murder

'My job now is to remain the guy who isn't scared,' says opposition leader, who is recovering in Berlin from nerve agent attack

But hospital notes it's too early to gauge the 'potential long-term effects' of Russian opposition leader's severe poisoning from nerve agent

As international powers press Moscow to quickly investigate alleged poisoning of top Putin rival, Russia rejects 'unfounded attacks'

German hospital treating Alexei Navalny says he is 'responding to verbal stimuli,' but it's too early to gauge 'potential long-term effects of his severe poisoning'

Spokesman pushes back against claim Moscow was responsible for attack on Putin critic; Merkel refuses to rule out consequences for Baltic Sea pipeline as part of possible sanctions

NATO says there's 'proof beyond doubt' that Russian opposition leader was given Novichok; US president says nuclear arms negotiations with Moscow more important than anything

Dismissing unease among international medical community over fast-tracked testing, capital city's mayor says 'post-registration research' will last 6 months, involve 40,000 people

German doctors confirm cholinesterase inhibitors used on Russian opposition leader, similar to nerve agent used to poison Russian spy Sergei Skripal in Britain in 2018

Contradicting Russian doctors, who blamed a metabolic disorder, German medical officials say Putin critic was probably hit by substance that targets central nervous system