Turkey has launched air strikes against Kurdish rebels in northern Iraq following a bomb attack in Ankara that killed 37 people.
No group said it carried out the attack but PM Ahmet Davutoglu said evidence "almost certainly" pointed towards the banned PKK Kurdish separatist group.
One of the bombers, who also died in the blast, was "definitely" a woman, Deputy PM Numan Kurtulmus said.
President Recep Tayyip Erdogan vowed a crackdown after Sunday's bombing.
Mr Davutoglu said 11 people had so far been detained in connection with the attack.