United Nations High Commissioner for Human Rights noted that nerve agents and radioactive isotopes such as Novichok and Polonium-210 were sophisticated substances that are very hard to get hold of.
Washington imposed an initial batch of sanctions last year on Moscow after determining that Moscow had used a nerve agent against a former Russian double agent, Sergei Skripal, and his daughter Yulia, in Britain, which Moscow denies.
The poisoning of a former Russian double agent, Sergai Skripal, in the British city of Salisbury stunned the world this year.
Investigative website Bellingcat named the second suspect in the poisoning of former Russian spy Sergei Skripal as Alexander Yevgenyevich Mishkin who was charged by Britain last month under the name of Alexander Petrov.
Sergei Skripal, a former colonel in Russian military intelligence who betrayed dozens of agents to Britain's MI6 foreign spy service, and his daughter Yulia, were found unconscious on a public bench in the southern city of Salisbury on March 4.
Dawn Sturgess, 44, was exposed to the nerve agent, the same substance used to poison former Russian spy and his daughter in March. Meanwhile, Russia says presence of poisonous substance "danger not only for the British, but for other Europeans."
Doomsday cult leader Shoko Asahara and several followers were executed for their roles in a deadly 1995 gas attack on the Tokyo subways and other crimes, Japanese media reported.
Two Britons became critically ill after an apparently chance encounter with the poison near the site of the March attack on Sergei and Yulia Skripal.
A British woman and man were hospitalised after being found unwell on Saturday near Salisbury where a former double agent Sergei Skripal and his daughter were attacked in March.
Sergei Skripal and his daughter were found unconscious following an alleged nerve agent attack in Salisbury in UK in March. Britain blamed Russia for the attack. Moscow retaliated in kind.
Britain says Yulia and her father, Sergei Skripal - a former Russian spy - were poisoned with a nerve agent. London blames Moscow for the attack. Russia denies the allegation which has plunged relations with the West to a post-Cold War low.
Russia last week ordered 60 US diplomats to leave the country in tit-for-tat retaliation over the alleged nerve-agent poisoning of an ex-Russian spy and his daughter in Britain. Meanwhile, Russian foreign minister has called the poisoning "staged".
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2020 TRT World.