(Simon Dawson/Bloomberg)

Russian billionaire Roman Abramovich and Ukrainian peace negotiators fell ill this month with symptoms that point to poisoning following a meeting in Kyiv, according to a report.

Abramovich, who has business ties with Russian President Vladimir Putin, has shuttled between Moscow, Lviv, and other areas, serving as an intermediary between Russia and Ukraine as the two countries wage war. He, along with at least two senior members of the Ukrainian delegation, developed symptoms that included red eyes, constant and painful tearing, and peeling skin on their faces and hands, the Wall Street Journal, citing people familiar with the incident, reported.