A Turkish security guard and a suicide bomber were killed and several more were wounded early Friday in an explosion at the U.S. Embassy in Ankara, Turkish media reported. “It was a huge explosion,” said travel agent Kamiyar Barnos, whose shop just 100 meters from the embassy was shattered. While no one has taken credit for the attack yet, Turkey has long called for U.S. intervention in Syria, and Turkey is hosting hundreds of NATO soldiers from the U.S. and elsewhere who are using a Patriot missile defense system along the border with Syria. Domestically, Turkey's main domestic terrorist group is the Kurdistan Workers’ Party, whose leaders were killed last month in Paris.