Turkish President Recep Tayyip Erdogan said in a nationally televised address Sunday that the suicide bomber in the outdoor wedding party attack that killed dozens was between 12 and 14 years old. At least 50 people were killed and dozens of others wounded in the attack late Saturday in the southeastern city of Gaziantep, reports the AP. Erdogan blamed the Islamic State for the attack. The US ambassador to Turkey, John Bass, condemned the "barbaric attack," saying that "we stand by our ally Turkey and pledge to continue to work closely together to defeat the common threat of terrorism." Erdogan issued a statement early Sunday saying that ISIS was "the most likely perpetrator of the Gaziantep attack." Erdogan said there was "absolutely no difference" between ISIS, Kurdish rebels, and the movement of US-based cleric Fethullah Gulen, calling them terrorist groups. (More ISIS stories.)