riot police

KIEV, UKRAINE - FEBRUARY 20:  Anti-government protesters continue to clash with police in Independence square, despite a truce agreed between the Ukrainian president and opposition leaders on February 20, 2014 in Kiev, Ukraine. After several weeks of calm, violence has again flared between police and anti-government protesters, who are calling for the ouster of President Viktor Yanukovych over corruption and an abandoned trade agreement with the European Union.  (Photo by Jeff J Mitchell/Getty Images)

Jeff J Mitchell/Getty

Anti-government protesters continue to clash with police in Independence Square, despite a truce agreed between the Ukrainian president and opposition leaders on Wednesday in Kiev. After several weeks of calm, violence has again flared between police and anti-government demonstrators, who are calling for the ouster of President Viktor Yanukovich over corruption and an abandoned trade agreement with the EU. 

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH - Anti-government protesters carry an injured man on a stretcher in Independence Square in Kiev February 20, 2014. Ukrainian protesters seized back Kiev's Independence Square in fresh clashes with riot police on Thursday that left several injured and possibly two demonstrators dead.   REUTERS/David Mdzinarishvili (UKRAINE  - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) TEMPLATE OUT.

David Mdzinarishvili/Reuters

Anti-government protesters carry an injured man on a stretcher in Independence Square in Kiev on Thursday morning. Ukrainian protesters seized back Kiev’s Independence Square in fresh clashes with riot police on Thursday that left several injured and possibly two demonstrators dead.

Interior Ministry members are on fire as they stand guard during clashes with anti-government protesters in Kiev...Interior Ministry members are on fire as they stand guard during clashes with anti-government protesters in Kiev February 18, 2014. Several thousand protesters clashed with police near the Ukrainian parliament on Tuesday after being stopped from marching to the building in a move to keep up pressure on President Viktor Yanukovich. After being blocked by a line of trucks about 100 metres short of the building, protesters hurled stones at police, a Reuters witness said. REUTERS/Vlad Sodel

Vlad Sodel/Reuters

Police catch fire as they stand guard during clashes with anti-government protesters in Kiev, Ukraine. Several thousand protesters clashed with police near the Ukrainian parliament after being stopped from marching to the building in a move to keep up pressure on President Viktor Yanukovich. After being blocked by a line of trucks about 100 metres short of the building, protesters hurled stones at police, a Reuters witness said. 

Thai riot police officers assist a colleague during clashes with anti-government protesters near Government House in Bangkok...Thai riot police officers assist a colleague after an explosion during clashes with anti-government protesters near Government House in Bangkok February 18, 2014. A Thai police officer was killed and dozens of police and anti-government protesters were wounded in gun battles and clashes in Bangkok on Tuesday, officials and witnesses said. REUTERS/Athit Perawongmetha

Athit Perawongmetha/Reuters

Riot police assist a colleague after an explosion during clashes with anti-government protesters near Government House in Bangkok. A police officer was killed and dozens of police and anti-government protesters were wounded in gun battles and clashes in Bangkok, officials and witnesses said. 

Riot police stand behind crosses installed by anti-government protesters in memory of the people who have died and went missing during clashes in Ukraine, near the barricades in Kiev...Riot police stand behind crosses installed by anti-government protesters in memory of the people who have died and went missing during clashes in Ukraine, near the barricades in Kiev February 11, 2014. Ukrainian protesters, now in their third month of action, kept up pressure on President Viktor Yanukovich on Sunday with a mass rally where opposition leaders called for an end to his "dictatorial" powers.  REUTERS/Konstantin Grishin

Konstantin Grishin/Reuters

Riot police stand behind crosses installed by anti-government protesters in Kiev, in memory of the people who have died or gone missing during clashes in the Ukraine 

Units of ZOMO (Motorized Reserves of the Citizens' Militia) perform during reenacted street riots - a reconstruction of historical events of 13 December 1981, in Lublin, Poland. Martial law in Poland was declared by former general Wojciech Jaruzelski on 13 December 1981 aiming to block reforms urged by the 'Solidarity' movement.

Wojciech Pacewicz/EPA

Units of the Zomo riot police take part in a re-enactment of riots that took place on December 13 1981, in Lublin, Poland, when martial law was declared by General Wojciech Jaruzelski, with the aim of blocking reforms urged by the Solidarity movement

Riot policemen stand guard outside the Army Club where the Prime Minister Yingluck Shinawatra held her cabinet meeting in Bangkok December 10, 2013. Yingluck pleaded on Tuesday for anti-government demonstrators to clear the streets and support a snap election, but defiant protest leaders called for her to step down within 24 hours.

Athit Perawongmetha /Reuters

In Thailand, riot police stand guard outside the Army Club where Yingluck Shinawatra, prime minister, held her cabinet meeting in Bangkok. Ms Yingluck pleaded on Tuesday for anti-government demonstrators to clear the streets and support a snap election

Riot police officers block Pro-European Union activists gathered at the Independence Square in Kiev, Ukraine, Monday, Dec. 9, 2013. The policemen, wearing helmets and holding shields, formed a chain across Kiev s main street outside the city building. Organizers called on protesters to vacate the city hall and the other building which the opposition had used as its headquarters.

Efrem Lukatsky/AP

Riot police officers block Pro-EU activists gathered at Independence Square in Kiev, Ukraine. The policemen formed a chain across Kiev’s main street outside the city building.

A supporter of the Muslim Brotherhood and ousted Egyptian President Mohamed Mursi shouts slogans in front of tear gas fired by riot police and army, during clashes at El-Talbyia near Giza square, south of Cairo, November 29, 2013. Mursi's supporters have staged frequent protests across Egypt, many of them after Friday prayers, since the army deposed him on July 3 in response to mass protests against his rule, and arrested most of the top leaders of his Muslim Brotherhood.

Amr Abdallah Dalsh/Reuters

A supporter of the Muslim Brotherhood and ousted Egyptian president Mohamed Morsi shouts slogans as riot police and soldiers fire tear gas during clashes at Talbiya, in Giza, Egypt

Supporters of deposed Egyptian President Mohamed Mursi run from tear gas fired by riot police during clashes on the Sixth of October Bridge over the Ramsis square area in central Cairo...Supporters of deposed Egyptian President Mohamed Mursi run from tear gas fired by riot police during clashes on the Sixth of October Bridge over the Ramsis square area in central Cairo July 15, 2013. Police fired tear gas in central Cairo on Monday when protesters calling for the reinstatement of the ousted Islamist president, Mohamed Mursi, scuffled with drivers and passers-by annoyed that they had blocked major roads. REUTERS/Amr Abdallah Dalsh  (EGYPT - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

Amr Abdallah Dalsh/Reuters

Supporters of Mohamed Morsi, the deposed president of Egypt, run from tear gas fired by riot police during clashes on the Sixth of October Bridge over the Ramsis square area in Cairo. Police moved in when protesters, calling for the reinstatement of Mr Morsi, scuffled with drivers and passers-by who became annoyed by the road being blocked