A counterterrorism unit has taken over the case. Sergei Skripal remains in critical condition.
Sergei Skripal and his daughter are in critical condition at an English hospital.
This week, the inquiry into the death of Alexander Litvinenko will deliver its findings.
Former agent-turned-Kremlin critic Alexander Litvinenko died after drinking tea laced with radioactive poison in 2006.
"If the Russian state is responsible, Putin is responsible."
Interview With Marina Litvinenko, Widow of Poisoned Ex-FSB Operative and Putin Critic Alexander Litvinenko
Marina Litvinenko is the widow of Russian FSB agent Alexander Litvinenko, who fled Russia for the United Kingdom in 2000. Alexander Litvinenko was murdered by radioactivity poisoning in London in 2006; and since then, Marina Litvinenko has become an activist who has pushed for several inquiries into the events leading to his death.
I am angry with you because you traded in freedom for a little bit of comfort; you ignored all the warning signs or, even worse, knew what was happening but decided not to get involved.
Snowden, who was virtually trapped in the transit area of the Moscow airport for over a month, apparently found the leadership
"It is a political decision of the British government," Litvinenko's widow Marina told reporters after the news was broken
German authorities have launched an investigation into a possible poisoning attack against a Russian dissident couple living