A blast outside the U.S. Embassy in Ankara, Turkey, killed at least two people, the U.S. State Department confirmed Friday, CBN News reports. According to a police official, a suicide bomber set off an explosive at the embassy entrance. The bomb apparently went off inside the security checkpoint, and Turkish TV reported that two security guards died. "We can confirm a terrorist blast at a checkpoint on the perimeter of our embassy compound in Ankara, Turkey, at 1:13 p.m. local time, or 6:15 a.m. EST," said State Department spokeswoman Victoria Nuland. No one has claimed responsibility for the attack, but Kurdish rebels and Islamic terrorists are active in Turkey, as well as al Qaeda-linked militants. "We are working closely with the Turkish national police to make a full assessment of the damage and the casualties and to begin an investigation," Nuland said.