The TAK, which on Thursday claimed responsibility for Sunday's attack that killed 37 people in Ankara, is a militant Kurdish nationalist faction established in 2005.
The TAK's goal is an independent Kurdish state in eastern and southeastern Turkey and it has adopted a strategy of bomb attacks throughout Turkey, with a focus on western and central Turkey, including tourist areas in Istanbul, Ankara and the country's Mediterranean resorts.
Some Turkish security analysts reportedly allege that Bahoz Erdal is the TAK's leader, although this is not verified. The group was formed by PKK leaders before they separated from the PKK and accusing it of passivity.
The PKK distances itself from the TAK's actions, although the two organizations are reportedly affiliated. The Turkish state refuses to distinguish between the TAK and the PKK, although the U.S. designated TAK a discrete terrorist organization in 2008. The UN, Russia, China, Egypt and the EU don't consider the TAK a terrorist organization.
jh/msh (AFP, Reuters)