Open-source investigations report that the agents shadowed Dmitry Bykov, who fell severely ill with similar symptoms in 2019
Russian agents who had tailed opposition leader Alexei Navalny before his poisoning also shadowed a journalist who had earlier fallen severely ill with similar symptoms, according to the investigative organisation Bellingcat.
Dmitry Bykov, an author and journalist who is an outspoken critic of President Vladimir Putin, spent five days in a coma after he became sick aboard an aeroplane while on a lecture tour in 2019.