http://www.sciencemag.org/news/2020/09/poisoning-putin-opponent-renews-spotlight-deadly-russian-chemical-weapon

Investigators examine the site in the United Kingdom where a former Russian spy was poisoned with a Novichok agent in 2018. German officials today said a similar agent was used to poison a prominent Russian opposition leader.

A notorious nerve poison is back in the news. The German government said today that Alexei Navalny, a prominent opponent of Russian President Vladimir Putin, was poisoned with a chemical similar to Novichok, a deadly nerve agent implicated in other attacks on Russians who have crossed the current regime.