former governor of Kharkiv Mykhailo Dobkin delivers a speech during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY

former governor of Kharkiv Mykhailo Dobkin delivers a speech during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY

former governor of Kharkiv Mykhailo Dobkin delivers a speech during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY

former governor of Kharkiv Mykhailo Dobkin is applauded after delivering a speech during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY

former governor of Kharkiv Mykhailo Dobkin is pictured during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY

former governor of Kharkiv Mykhailo Dobkin is pictured during a convention of former ruling Party of Regions in Kiev on March 29, 2014. Dobkin The pro-Russian camp's main candidate for Ukrainian presidential elections emerged from a tumultuous Regions Party congress that first purged Yanukovych and several other ousted ministers from its ranks. It decided on Saturday to back the candidacy of former eastern Kharkiv region governor Mykhailo Dobkin -- a colourful figure of limited mass appeal who is currently under investigation for urging Russian speakers to resist Kiev's rule. The 44-year-old Dobkin will have to limit his campaigning to daylight hours because he has been placed under partial house arrest and is forbidden from being outdoors in the evenings. AFP PHOTO/YURIY KIRNICHNY