A Turkey-based Kurdish militant group has claimed responsibility for a car bombing in the capital Ankara that killed 28 people, mostly soldiers, on Wednesday.

A Turkey-based Kurdish militant group has claimed responsibility for a car bombing in the capital Ankara that killed 28 people, mostly soldiers, on Wednesday.    

The Kurdistan Freedom Falcons (TAK), in a statement posted on its website, said it carried out the attack in response to the policies of President Recep Tayyip Erdogan.

“This act was conducted to avenge the massacre of defenseless, injured civilians,” the group said, threatening further attacks.

The bomber, it said, was a 26-year-old Turkish national born in the eastern city of Van. It identified him Abdulbaki Sonmez who carried out the bombing on a Turkish military convoy in Ankara.

The TAK was once linked to the Kurdistan Workers Party but it says its relationship with PKK militants has been severed.

Erdogan has said he had "no doubt" that Syrian Kurdish groups fighting Takfiris carried out the bombing. Turkish Prime Minister Ahmet Davutoglu said a Syrian national with links to the People’s Protection Units (YPG) was behind the attack.  

Davutoglu has also accused the Syrian government of being directly responsible for the bombing in Ankara.  

The leader of the YPG denied that the group's armed YPG wing was behind the attack, saying Ankara was making the accusation in order to escalate its attacks in Syria.

Turkey is supporting militants fighting to topple Syrian President Bashar al-Assad.

Ankara has been shelling YPG positions in northern Syria over the last few days in an attempt to stop Kurdish forces from reaching the border with Turkey.