Story highlights Turkish Prime Minister Ahmet Davutoglu points to ISIS in probe of weekend bombings

Two suicide bombers are believed to have carried out Ankara attack, Turkey says

Turkish airstrikes reportedly kill up to 49 PKK members over weekend

(CNN) Though no group has claimed responsibility for the deadly weekend bombings in Ankara, the focus of the investigation is the Islamic extremist group ISIS, Turkey's Prime Minister said Monday.

Two suicide bombers are believed to have carried out Saturday's attack near Ankara's main train station, killing at least 97 people and wounding nearly 250 others, Turkey has said.

Authorities have begun to collect DNA samples from relatives of those suspected of having joined ISIS to help identify possible suspects in the bombings, Turkey's semiofficial Anadolu news agency reported.

Not specifically identifying any group behind the act, Prime Minister Ahmet Davutoglu told Turkish television station NTV on Monday, "We investigate Daesh (ISIS) as our No. 1 priority. There (has) been good progress toward identifying a name. That name points to an organization."

Davutoglu said his country had come face to face with suicide bombers a long time ago. "This attack will not turn Turkey into a Syria," he said.

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