The Turkish forces are part of a coalition that includes Syrian rebels and American aircraft aimed at pushing ISIS from the Syrian border town of Jarablus.
The deadly bombing in Ankara was carried out by Syrian Kurdish militia with help from the PKK, Turkey said, as another bomb exploded in the southeast of the country.
The bomb struck a Turkish military convoy as it waited at a traffic light during rush hour on Wednesday.
The Syrian border town will now be self-administered, but part of the canton, or province, of Kobane around 40 miles to the west, in a move that's likely to fuel Turkish concerns of Kurdish expansion.
A bulwark against the Islamic State, the Kurds are seizing the moment to seek support for their cause. VICE News met Sinam Mohamad, co-leader of the coalition governing Syrian Kurdistan, on a visit to the US.
The Kurds in Kobane are locked in a deadly fight with ISIS.
The "Geneva II" talks got off to a bad start, as participants immediately accused one another of being illegitimate and committing horrible crimes. And even if the two sides could come together, they'd have to figure out how to deal with the jihadist...
Fifty young men and women, their faces wrapped in keffiyehs, stood rigid as they lined up in military formations and marched into the center of the street. These young people were members of the Kurdish militia known as the YPG, who protect the Kurdish...