A group connected to militant Kurdistan Workers Party (PKK) claimed responsibility on Thursday for a car bomb that killed three people in central Ankara and it threatened more attacks on Turkish cities.
The Kurdistan Freedom Hawks (TAK) said in a statement that Tuesday's attack on the capital was the "beginning of a series of attacks".
It also said it was behind a recent attack in Antalya, on the Mediterranean coast, where several tourists were wounded by a small explosion on a beach.
"We, as TAK, claim responsibility for actions in Ankara and Antalya," the statement said. "Big Turkish cities will be our main targets."
Last year TAK claimed responsibility for a bomb attack on a military bus that killed five people, and a suicide bomb attack that wounded 32 people in Istanbul.
TAK is regarded as close to the PKK, the main militant group.
During the past month Turkish warplanes have carried out more than 150 air strikes on PKK targets in northern Iraq.
ReutersLast Mod: 23 Eylül 2011, 17:51