Moscow (CNN)A Russian agent sent to tail opposition leader Alexey Navalny has revealed how he was poisoned in August -- with the lethal nerve agent Novichok planted in his underpants. The stunning disclosure from an agent who belonged to an elite toxins team in Russia's FSB security service came in a lengthy phone call following last week. In what he was told was a debriefing, Konstantin Kudryavtsev also talked about others involved in the poisoning in the Siberian city of Tomsk, and how he was sent to clean things up. But the agent was not speaking to an official in Russia's National...…Moscow (CNN)A Russian agent sent to tail opposition leader Alexey Navalny has revealed how he was poisoned in August -- with the lethal nerve agent Novichok planted in his underpants. The stunning disclosure from an agent who belonged to an elite toxins team in Russia's FSB security service came in a lengthy phone call following last week. In what he was told was a debriefing, Konstantin Kudryavtsev also talked about others involved in the poisoning in the Siberian city of Tomsk, and how he was sent to clean things up. But the agent was not speaking to an official in Russia's National...WW…

Tomsk, Russia (CNN)At about 9 a.m. on August 13, a 33-year-old Russian woman named Maria Pevchikh checked in for a flight from Moscow to the Siberian city of Novosibirsk. She was not alone.Trailing her to Domodedovo airport that morning was a member of an elite unit of the Russian Security Service, the FSB. Oleg Tayakin, a slim, balding man with blue-green eyes, remained at the airport until Pevchikh left. Pevchikh was traveling in advance of a visit to Siberia by Russian opposition leader Alexey Navalny, whose anti-corruption campaign she leads.The Navalny team is constantly watched by the...…Tomsk, Russia (CNN)At about 9 a.m. on August 13, a 33-year-old Russian woman named Maria Pevchikh checked in for a flight from Moscow to the Siberian city of Novosibirsk. She was not alone.Trailing her to Domodedovo airport that morning was a member of an elite unit of the Russian Security Service, the FSB. Oleg Tayakin, a slim, balding man with blue-green eyes, remained at the airport until Pevchikh left. Pevchikh was traveling in advance of a visit to Siberia by Russian opposition leader Alexey Navalny, whose anti-corruption campaign she leads.The Navalny team is constantly watched by the...WW…

Video Ad FeedbackCNN investigation uncovers tailing of Navalny prior to poisoningNever-before-seen flooding leaves one-third of Pakistan underwaterForeign fighters join Ukraine's southern counteroffensive against RussiaMore than a third of Pakistan is underwater. See what's happening thereWatch the moment Liz Truss enters Downing Street as PMMan survives 11 days in ocean floating alone in a freezerIsrael Defense Forces: Soldier had no idea shots were fired toward journalist'Blades, not bullets': Timeline of mass stabbing in CanadaIsland could lose 98% of land from climate change. See how...…Video Ad FeedbackCNN investigation uncovers tailing of Navalny prior to poisoningNever-before-seen flooding leaves one-third of Pakistan underwaterForeign fighters join Ukraine's southern counteroffensive against RussiaMore than a third of Pakistan is underwater. See what's happening thereWatch the moment Liz Truss enters Downing Street as PMMan survives 11 days in ocean floating alone in a freezerIsrael Defense Forces: Soldier had no idea shots were fired toward journalist'Blades, not bullets': Timeline of mass stabbing in CanadaIsland could lose 98% of land from climate change. See how...WW…