German authorities say there are signs that the killing of a Georgian man in a Berlin park was a state-sanctioned murder. Zelimkhan Khangoshvili fought against Russian forces in the Second Chechen War. Russia denies any involvement in his killing. Sean Gallup/Getty Images hide caption
Investigators walk next to a police tent last year in Salisbury, England, near where former Russian double agent Sergei Skripal and his daughter Yulia were found critically ill. Steve Parsons/AP hide caption
The GRU, Russia's military intelligence agency in Moscow, is implicated in the latest report released by Bellingcat. The international investigative group says it has identified the third suspect in the poisoning of former Russian spy Sergei Skripal. Pavel Golovkin/AP hide caption
Aric Toler is part of Bellingcat, an international Internet research organization that has meticulously investigated conflicts around the world. This week, the online group outed one of two Russian agents believed to have been involved in poisonings in the U.K. Meredith Rizzo/NPR hide caption
Alexander Petrov and Ruslan Boshirov, charged with the attempted murder of ex-spy Sergei Skripal and his daughter, Yulia. A new report says Boshirov is actually Anatoly Chepiga, a Russian military intelligence officer. U.K. Metropolitan Police/AP hide caption
Russian President Vladimir Putin says two men identified by British police as suspects in the poisoning of a former KGB agent and his daughter are private citizens, not government agents. Scotland Yard released photos of the men last week. U.K. Metropolitan Police hide caption
A specialist team member in a police protective suit in Salisbury, England, last month. British police scoured sections of Salisbury and Amesbury in southwest England, searching for a container feared to be contaminated with traces of the deadly nerve agent Novichok. Matt Dunham/AP hide caption
Sergei Skripal has left Salisbury District Hospital, one month after his daughter, Yulia, was also discharged. The pair were found poisoned by an exotic nerve agent in March. Peter Nicholls/Reuters hide caption
The Organization for the Prohibition of Chemical Weapons says the poison used against Sergei and Yulia Skripal "was of high purity." The U.K. has concluded a state actor — namely, Russia — carried out the attack. Peter Dejong/AP hide caption
The main entrance to the Salisbury District Hospital in southern England, seen early last month after Sergei and Yulia Skripal were admitted after their poisoning. On Friday, hospital officials noted that both father and daughter have been improving. Chris J. Ratcliffe/AFP/Getty Images hide caption
Buses believed to be carrying expelled diplomats leave the U.S. Embassy in Moscow on Thursday. The Kremlin ordered 60 American diplomats to leave Russia by Thursday, responding to a similar move by the U.S. Pavel Golovkin/AP hide caption
Britain's Prime Minister Theresa May stands outside a pub as she views the area where former Russian double agent Sergei Skripal and his daughter were found critically ill in March. Toby Melville/AP hide caption
The Defence Science and Technology Laboratory in Porton Down, U.K., seen last month. Researchers at the lab were tasked with testing the nerve agent used to poison Sergei Skripal and his daughter, Yulia, in early March. Jack Taylor/Getty Images hide caption
Russian Foreign Minister Sergey Lavrov announced Thursday that Moscow is expelling 60 U.S. diplomats. Alexander Zemlianichenko/AP hide caption
Yulia Skripal, seen in an image taken from her Facebook account earlier this month. The 33-year-old daughter of former Russian spy Sergei Skripal is "improving rapidly," according to hospital officials. Yulia Skripal/Facebook via AP hide caption
Britain's Metropolitan Police said Sergei Skripal, a former Russian spy, and his daughter were likely poisoned with a rare nerve agent at his home. Andrew Matthews/AP hide caption
British Prime Minister Theresa May, center, with German Chancellor Angela Merkel, right, and French President Emmanuel Macron during a news conference following a meeting on the sidelines of the European Union leaders summit in Brussels, on Thursday. Ludovic Marin/AFP/Getty Images hide caption
Nikolai Glushkov's death is being investigated as a murder, London's Metropolitan Police say. Metropolitan Police hide caption
U.S. Ambassador to the United Nations Nikki Haley speaks during a Security Council meeting on the situation between Britain and Russia, on Wednesday. Mary Altaffer/AP hide caption
Military personnel wearing protective suits investigate the poisoning of Sergei Skripal in Salisbury, England. Skripal and his daughter, Yulia, remain critically ill. Chris J Ratcliffe/Getty Images hide caption
Military personnel outside Bourne Hill police station in Salisbury, England, Sunday, as police and members of the armed forces probe last week's suspected nerve agent attack on Russian double agent spy Sergei Skripal. Andrew Matthews/AP hide caption
Assistant Commissioner Mark Rowley gives a statement on Wednesday in Salisbury, England. Sergei Skripal, who was granted refuge in the U.K. following a prisoner swap between the U.S. and Russia in 2010, and his daughter remain critically ill after being exposed to an unknown substance now believed to have been a nerve agent. Chris J Ratcliffe/Getty Images hide caption