Pro-Ukrainian supporters attend a rally in the central Black Sea port of Odessa
Pro-Ukrainian supporters attend a rally in the central Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
A woman reacts as she stands near the entrance to a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa
A woman reacts as she stands near the entrance to a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
People enter a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa
People enter a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
A man holds carnations as he enters a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa
A man holds carnations as he enters a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
People enter a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa
People enter a burnt trade union building, the site of recent street battles between pro-Russian and pro-Ukrainian supporters, in the Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
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Pro-Russian supporters shout slogans during a rally inside a city police department after they stormed it in Black Sea port of Odessa
Pro-Russian supporters shout slogans during a rally inside a city police department after they stormed it in Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Pro-Russian supporters shout slogans during a rally inside a city police department after they stormed it in Black Sea port of Odessa
Pro-Russian supporters shout slogans during a rally inside a city police department after they stormed it in Black Sea port of Odessa May 4, 2014. Pro-Russian militants stormed a Ukrainian police station in Odessa on Sunday and freed 30 fellow activists as the prime minister blamed police corruption there for dozens of deaths in rioting on Friday. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
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Participants of a rally welcome men just released from a city police department and who were earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters as riot police stand guard in the Black Sea port of Odessa
Participants of a rally welcome men (2nd and 3nd R) just released from a city police department and who were earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters as riot police stand guard in the Black Sea port of Odessa May 4, 2014. Police in Ukraine's southern port town of Odessa started on Sunday to release pro-Russian activists detained in clashes two days ago, a Reuters photographer said. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)