Foreign labs confirm Alexei Navalny poisoned with Soviet-era nerve agent Novichok, says German government
The Kremlin has bristled at calls from Chancellor Angela Merkel and other world leaders for Russia to answer questions in the case and accused the West of trying to smear Moscow.
Facebook's Silicon Valley campus given all-clear after sarin nerve-agent scare
Four of Facebook’s buildings were evacuated and two people were checked for possible sarin exposure.
UK dismisses claim of two Russian nerve agent attack suspects as "lies and blatant fabrications"
The UK government Thursday dismissed as "lies and blatant fabrications" the claim of the two Russians accused of carrying out a deadly nerve agent attack in the country on a former Russian spy and his daughter that they were innocent civilian tourists.
Vladimir Putin says men suspected of poisoning former spy in UK identified as civilians, urges them to speak to media
The British government has said Putin is ultimately responsible for the nerve agent attack on Sergei Skripal, a claim the Kremlin has strongly denied.
UK security minister says Russian president 'ultimately' responsible for nerve agent attack on former spy
The UK blamed Russia for the 4 March attack, sparking furious denials. In the aftermath, Britain and its allies expelled dozens of Russian diplomats, prompting Russian to respond in kind.
UK nerve agent inquiry: Police finds over 400 'potentially contaminated' items in probe into poisoning of two Britons
The items found in UK's Novichok nerve agent poisoning probe have been sent for lab tests.
UK woman Dawn Sturgess dies after being exposed to Soviet-era nerve agent Novichok, say British authorities
A woman in southwest England died after being exposed to nerve agent Novichok in March
What is Novichok? Russian nerve agent that critically wounded former spy among deadliest weapons developed by man
One of the Novichok group of chemicals is so toxic that it's five to eight times more potent than the VX nerve agent, which was used in the poisoning of Kim Jong-un's half brother in North Korea.
UK nerve agent attack: Scores of Russian, US diplomats pack bags amid peaking post-Cold War tensions
Russian and US diplomats packed their bags a diplomatic crisis between Moscow and the West, with post-Cold War tensions peaking in the wake of a nerve agent attack on a former Russian spy in Britain
NATO expels seven Russian diplomats, joins two dozen nation in condemning Moscow over UK nerve agent attack
NATO joined two dozen governments around the world in expelling Russian diplomats in response to a nerve agent attack in Britain, marking what London called a "turning point" in the West's relations with Moscow
UK nerve agent attack: Australia joins 14 EU nations, to expel 2 Russian officials for 'actions inconsistent with their status'
The Australian government will expel two Russian officials over the use of nerve agent allegedly by Moscow against a former Russian spy in the UK
UK nerve agent attack: US, EU expel scores of Russian diplomats, Kremlin promises to respond to 'provocative gesture'
The United States said it would expel 60 Russian diplomats, joining governments across Europe punishing the Kremlin for a nerve agent attack on a former Russian spy in Britain that they have blamed on Moscow
Former spy Sergei Skripals's nerve-agent poisoning snowballs into international scuffle as US, France support UK against Russia
Sergei Skripal is a retired Russian double agent who was leading a seemingly peaceful life in Britain when he and his daughter were targeted in a nerve agent attack.
Russia rejects UK's ultimatum to explain attack on former Russian spy, asks London for access to nerve agent
Russia rejected Britain's demand that Moscow provide an explanation over the poisoning of an ex-double agent and said London should provide Moscow with access to the nerve agent
UK gives Vladimir Putin midnight deadline to explain nerve agent attack on former Russian spy
Russian President Vladimir Putin faces a midnight deadline to explain to Britain how a nerve agent developed by the Soviet Union was used to strike down a former Russian double agent who passed secrets to British intelligence
Sarin, the gas that killed Syrians, is 26 times more deadly than cyanide gas: All you need to know
The US believes Syrian government employed a sarin-like nerve agent in a deadly attack in the country's northwest. Here are the key facts about sarin.
Syria: A year after chemical attacks, justice remains elusive
Syria's opposition and its allies, including the United States, accused Damascus of carrying out thechemical weapons attack. President Bashar Assad's government denied responsibility, and blamed the rebels.
Why is Sarin such a lethal chemical weapon? All you need to know
What is Sarin gas, and why does it have such a devastating effect on the human body? Here are some key facts: