A wounded person is rushed to an ambulance after a suicide bomb attack at the U.S. Embassy in Turkey's capital Ankara leaves a security guard and the attacker dead.<br/> <br />Dozens of police - who were forced to create a pathway to get the injured through the crowds - cordoned off the area after the explosion at a side entrance.<br/> <br />Provincial Governor Alaadin Yuksel told reporters that a suspected suicide bomber had detonated explosives.<br/> <br />Television footage also showed a door blown out and masonry from the wall around it scattered in front.<br/> <br />One witness said the blast was audible a mile away.<br/> <br />No one has claimed responsibility for the explosion but Islamist radicals, far-left and far-right groups and Kurdish separatist militants have all carried out attacks in Turkey in the past.<br/> <br />The main internal security threat comes from the separatist Kurdistan Workers Party or PKK whch has tended to focus its campaign largely on domestic targets.
