- No group has claimed responsibility for what the military calls a terror attack
- Twenty-eight people are dead and 61 are injured, an official says
- The explosion hit military vehicles
Twenty-eight people were killed and 61 others were injured, according to Deputy Prime Minister Numan Kurtulmus.
The explosion hit three military vehicles and a private vehicle in central Ankara, near Turkish Parliament buildings, Turkey's semiofficial Anadolu news agency reported, citing Ankara Gov. Mehmet Kiliclar. The vehicles were stopped at a traffic light, the military said.
Authorities believe a bomb-laden vehicle caused the explosion, Kiliclar said, according to Anadolu.
Video aired on CNN Turk showed large flames reaching toward the night sky from an area on the ground. Lights from numerous emergency vehicles flashed nearby.
No group has claimed responsibility.
"Our determination to respond in kind against such attacks against our unity and future from outside and inside is even more strengthened through such attacks," Turkish President Recep Tayyip Erdogan said in a statement. "Turkey will not hesitate to use its right to self-defense anytime, anywhere, and in all situations."
His thoughts were echoed by U.S. Defense Secretary Ash Carter.
"We strongly condemn this cowardly attack which appears to have targeted buses carrying Turkish military personnel. We stand with our Turkish allies in the face of this horrific act, which only strengthens our resolve to deepen our ongoing cooperation in the fight against terrorism," he said.
Soner Cagaptay, a senior fellow at the Washington Institute for Near East Policy think tank, said that if it was a bomb attack, suspects could include ISIS
or the PKK, the Kurdish militant separatists that Turkey considers a terrorist group.
"There's definitely many reasons why Turkish reaction is going to be fierce" if this was an attack, he said.