Ankara
Smoke could be seen rising above the city after the blast.
Wednesday's attack claimed the lives of 28 people.
Wednesday's bombing is the latest in a string of attacks that have shocked the nation.
Relations between the two countries broke down in 2010 after an Israeli raid on a Gaza-bound flotilla killed eight Turkish citizens and one Turkish-American.
WHAT'S HAPPENING
The nation is still reeling from twin bombings that killed at least 95 people on Saturday.
The blasts hit a peace rally by leftists and Kurdish activists.
Syrian troops and militia backed by Russian warplanes mounted what appeared to be their first major coordinated assault on Syrian insurgents.
These photos are everything.
"The outcome is negative," a senior CHP official said.