At least 28 people died and 61 others were injured in a large explosion in the Turkish capital of Ankara on Wednesday, which targeted a bus carrying military personnel, according to an official at the armed forces' General Staff.
The explosion occurred during rush hour in an area close to where military headquarters and parliament are located.
"According to preliminary assessments, five people died and 10 people were injured," Governor Mehmet Kiliclar told the state-run Anadolu Agency.
"It is believed that a bomb-laden car caused the explosion."
It was not clear who was behind the bombing Wednesday.
Kurdish rebels, the Islamic State group and a leftist extremist group have carried out attacks in the country recently.