Kurdish YPG forces are behind the Ankara bomb attack, the Turkish prime minister has said.
The Syrian group carried out the attack that killed 28 people with PKK militants in Turkey, according to Mr Davutoglu.
In a live television speech, Davutoglu said the bombing showed that the Syrian Kurdish YPG is a terrorist organisation and that Turkey expects cooperation from its allies against the group.
Washington, which has said the YPG is not a terrorist group, has backed the insurgents in the fight against Islamic State in Syria.
Mr Davutoglu said nine people have been detained after the attack yesterday.
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