People gather in front of Ukrainian Interior Ministry security forces members who form cordon during rally outside a city police department in the Black Sea port of Odessa,
People gather in front of Ukrainian Interior Ministry security forces members who form a cordon during a rally outside a city police department in the Black Sea port of Odessa, May 4, 2014. Ukrainian Prime Minister Arseny Yatseniuk accused Russia on Sunday of engineering clashes in Odessa that led to the deaths of more than 40 pro-Russian activists in a blazing building and pushed the country closer to civil war. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS CIVIL UNREST)
Participants of a rally welcome a man who was just released from a city police department in Odessa
Participants of a rally welcome a man (C) who was just released from a city police department and who was earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters 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)
People sit in a park near the town hall in Mariupol
People sit in a park near the town hall in Mariupol, eastern Ukraine May 4, 2014. Ukrainian Prime Minister Arseny Yatseniuk accused Russia on Sunday of engineering clashes in Odessa that led to the deaths of more than 40 pro-Russian activists in a blazing building and pushed the country closer to civil war. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST)
People walk past a gutted branch of Privat Bank near the town hall in Mariupol
People walk past a gutted branch of Privat Bank near the town hall in Mariupol, eastern Ukraine May 4, 2014. Ukrainian Prime Minister Arseny Yatseniuk accused Russia on Sunday of engineering clashes in Odessa that led to the deaths of more than 40 pro-Russian activists in a blazing building and pushed the country closer to civil war. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST)
Participants of a rally welcome a man who was just released from a city police department in Odessa
Participants of a rally welcome a man (C) who was just released from a city police department and who was earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters 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)
Participants of a rally welcome a man (C) who was just released from a city police department in Odessa
Participants of a rally welcome a man (C) who was just released from a city police department and who was earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters 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)
A Ukrainian policeman walks past a gutted branch of Privat Bank near the town hall in Mariupol
A Ukrainian policeman walks past a gutted branch of Privat Bank near the town hall in Mariupol, eastern Ukraine May 4, 2014. Ukrainian Prime Minister Arseny Yatseniuk accused Russia on Sunday of engineering clashes in Odessa that led to the deaths of more than 40 pro-Russian activists in a blazing building and pushed the country closer to civil war. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST CRIME LAW)
Participants of a rally welcome a man who was just released from a city police department in Odessa
Participants of a rally welcome a man (C) who was just released from a city police department and who was earlier arrested in recent street battles between pro-Russian and pro-Ukrainian supporters 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 TPX IMAGES OF THE DAY)
People walk past a gutted branch of Privat Bank near the town hall in Mariupol eastern Ukraine
People walk past a gutted branch of Privat Bank near the town hall in Mariupol, eastern Ukraine May 4, 2014. Ukrainian Prime Minister Arseny Yatseniuk accused Russia on Sunday of engineering clashes in Odessa that led to the deaths of more than 40 pro-Russian activists in a blazing building and pushed the country closer to civil war. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST)
Odessa police free pro-Russian activists held after fighting - witness
UKRAINE-CRISIS/ODESSA-RELEASE (URGENT):Odessa police free pro-Russian activists held after fighting - witness