According to a Wall Street Journal report, members of Ukraine's negotiating team as well as Russian oligarch Roman Abramovich, who has aided in peace talks between the warring sides, have suffered symptoms of poisoning such as red eyes and painful tearing.
Abramovich has spearheaded peace talks between Ukraine and Moscow, delivering a hand-written note from President Zelenskyy to Putin.
According to the report, hard-liners intent on breaking up a possible ceasefire agreement are suspected of involvement in the incident.