TOPSHOT - Activists of Ukrainian far-right groups burn a fire during their clashing with riot police in front of the Prosecutor General's Office in Kiev on September 17, 2018 as the Ukrainian authorities extradited a Russian citizen wanted by Moscow as a suspected Islamic State fighter. - Dozens of protesters, mostly from Ukraine's far-right groups, blocked the entrance to the building of prosecutor general's office with a trash can and set it on fire and then tried to storm it with a demand to sack the deputy prosecutor general who signed the permission to extradite Timur Tumgoyev, AFP photographer reports. (Photo by Sergei SUPINSKY / AFP)