epa03999383 Turkish riot police use tear gas to disperse protestors during an anti government demonstration in Istanbul, Turkey, 22 December 2013. Turkish Prime Minister Recep Tayyip Erdogan is under political pressure in the follow-up to the mass arrests for alleged bribery involving public tenders. The sons of the interior, economy and environment ministers were among those detained. Another 25 high-ranking police officers have been dismissed in Turkey following a wave of high-profile bribery arrests, bringing the total number officers removed to around 70, Turkish media reported 22 December. Erdogan on 18 December had denounced the corruption inquiry as a ‘dirty operation’ against his government. EPA/ULAS YUNUS TOSUN