AT LEAST FIVE KILLED IN ANKARA BLAST:

The explosion occurred during rush hour in an area close to where military headquarters and parliament are located. Governor Mehmet Kiliclar said the bomb appeared to have targeted a convoy of buses carrying military personnel.

“According to preliminary assessments, five people died and 10 people were injured,” Kiliclar told the state-run Anadolu Agency. “It is believed that a bomb-laden car caused the explosion.”

News reports said some cars caught fire and dozens of ambulances were sent to the scene. Dark smoke could be seen billowing from a distance.

Police told The Associated Press they are investigating the cause of 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.