Igor Girkin (Russian security officer, leaders of the armed group of Russian soldiers seizing Slavyansk)
Pavel Gubarev (self-proclaimed 'People's Governor' of Donetsk)
Robert Donya (self-proclaimed deputy 'People's Governor' of Donesk)
Mikhail Chumachenko (leader of the self-styled 'Donbass People's Militia')
Dmitry Kuzmenko (self-proclaimed 'People's Mayor' of Mariupol)
Anton Davidchenko (leader of Odessa protest till March)
Aleksandr Kharitonov (leader of 'Luhansk Guard' organization)
Arsen Klinchaev (member of the Party of Regions, leader of separatists in Luhansk)
Yuri Apukhtin (leader of the banned 'South-East' organization; Apukhtin is in detention and his trail started late May 2015 in Kharkiv)
Former adviser to the President of Russia Vladimir Putin and a senior fellow at the Cato Institute in Washington, DC, Andrey Illarionov estimates that at least 2,000 Russian intelligence officials are operating in eastern Ukraine.

Ukrainian intelligence claims that it has a dossier on more than forty Russian military intelligence, or GRU, operatives arrested so far on Ukrainian soil and the weapons and ammunition seized after being transported across the border from Russia.
The file is said to describe the role of an alleged GRU colonel, Igor Ivanovich Strielkov, who has been involved in agitation in the east, including his attempts to suborn Ukrainian soldiers with offers of cash.
The Ukrainian Security Service have put out a wanted poster for Strielkov, accusing him of a series of charges, included premeditated murder and organizing mass riots.
Russia insists that the allegations are false, and that a Mr. Streilkov does not even exist or "at least not as a Russian operative sent to Ukraine with orders to stir up trouble".

CNN presented a video from a large separatist rally held in a central Donetsk city square around lunchtime on 26 May. Lorries in the square carried armed Chechen paramilitaries.
Two told a CNN team they were from the Chechen capital, Grozny, and one indicated that he was formerly a policeman in Chechnya and was in Donetsk to serve the Russian Federation.
Russian and Ukraininan media published numerous reports on bodies of separatists being transported secretly back to Russia, usually through Uspenka border pass.
A few names of the killed volunteers were established—Sergey Zhdanovich (Сергей Жданович), Yuri Abrosimov (Юрий Абросимов), Aleksey Yurin (Алексей Юрин), Alexandr Efremov (Александр Ефремов), Evgeny Korolenko (Евгений Короленко).
The bodies were transported to Russian military base in Rostov-on-Don.
Some of the families were able to get the bodies secretly returned to them.
Most of the killed had past military experience.
According to the journalists Russian military commissariats (voyenkomat) in Rostov were actively recruiting volunteers for Donbas among former soldiers, especially with specific skills (ATGM, SAM, AGS-17) and those previously serving in Chechnya and Afghanistan.

On 18 June Daniel Baer (OSCE) noted that "there continue to be fighters and arms coming across the border from Russia to Ukraine in recent days and weeks, and we don't see any efforts to turn it off by Russia".
Igor Girkin (Russian security officer, leaders of the armed group of Russian soldiers seizing Slavyansk)
Pavel Gubarev (self-proclaimed 'People's Governor' of Donetsk)
Robert Donya (self-proclaimed deputy 'People's Governor' of Donesk)
Mikhail Chumachenko (leader of the self-styled 'Donbass People's Militia')
Dmitry Kuzmenko (self-proclaimed 'People's Mayor' of Mariupol)
Anton Davidchenko (leader of Odessa protest till March)
Aleksandr Kharitonov (leader of 'Luhansk Guard' organization)
Arsen Klinchaev (member of the Party of Regions, leader of separatists in Luhansk)
Yuri Apukhtin (leader of the banned 'South-East' organization; Apukhtin is in detention and his trail started late May 2015 in Kharkiv)
Former adviser to the President of Russia Vladimir Putin and a senior fellow at the Cato Institute in Washington, DC, Andrey Illarionov estimates that at least 2,000 Russian intelligence officials are operating in eastern Ukraine.
Ukrainian intelligence claims that it has a dossier on more than forty Russian military intelligence, or GRU, operatives arrested so far on Ukrainian soil and the weapons and ammunition seized after being transported across the border from Russia. The file is said to describe the role of an alleged GRU colonel, Igor Ivanovich Strielkov, who has been involved in agitation in the east, including his attempts to suborn Ukrainian soldiers with offers of cash. The Ukrainian Security Service have put out a wanted poster for Strielkov, accusing him of a series of charges, included premeditated murder and organizing mass riots. Russia insists that the allegations are false, and that a Mr. Streilkov does not even exist or "at least not as a Russian operative sent to Ukraine with orders to stir up trouble".
CNN presented a video from a large separatist rally held in a central Donetsk city square around lunchtime on 26 May. Lorries in the square carried armed Chechen paramilitaries. Two told a CNN team they were from the Chechen capital, Grozny, and one indicated that he was formerly a policeman in Chechnya and was in Donetsk to serve the Russian Federation. Russian and Ukraininan media published numerous reports on bodies of separatists being transported secretly back to Russia, usually through Uspenka border pass. A few names of the killed volunteers were established—Sergey Zhdanovich (Сергей Жданович), Yuri Abrosimov (Юрий Абросимов), Aleksey Yurin (Алексей Юрин), Alexandr Efremov (Александр Ефремов), Evgeny Korolenko (Евгений Короленко). The bodies were transported to Russian military base in Rostov-on-Don. Some of the families were able to get the bodies secretly returned to them. Most of the killed had past military experience. According to the journalists Russian military commissariats (voyenkomat) in Rostov were actively recruiting volunteers for Donbas among former soldiers, especially with specific skills (ATGM, SAM, AGS-17) and those previously serving in Chechnya and Afghanistan.
On 18 June Daniel Baer (OSCE) noted that "there continue to be fighters and arms coming across the border from Russia to Ukraine in recent days and weeks, and we don't see any efforts to turn it off by Russia".
2014 pro-Russian unrest in Ukraine