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.
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.
Provincial Governor Alaadin Yuksel told reporters that a suspected suicide bomber had detonated explosives.
Television footage also showed a door blown out and masonry from the wall around it scattered in front.
One witness said the blast was audible a mile away.
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.
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.