Turkish prosecutors said Monday they had remanded four people in custody over a deadly Ankara attack, as the identity of one of the two suicide bombers involved was revealed.

Turkish prosecutors said Monday they had remanded four people in custody over a deadly Ankara attack, as the identity of one of the two suicide bombers involved was revealed.

The suspects, who went before a judge on Sunday night, were charged with making "explosive devices with the intention to kill" and "an attempt to disrupt constitutional order", according to Anatolia news agency.

The prosecutor in charge of the case meanwhile issued a warrant for nine others accused of playing a part in the October 10 attack that killed 102 people, the worst of its kind in Turkey's history.

Turkish authorities have said the so-called 'Islamic State of Iraq and the Levant' (ISIL) takfiri group is the "number one suspect" for the attacks which targeted a pro-Kurdish and liberal peace rally calling for an end to hostilities between security forces and Kurdish rebels.

Prime Minister Ahmet Davutoglu confirmed Monday that one of the suicide bombers had been officially identified through DNA testing, with prosecutors naming him as Yunus Emre Alagoz.

Alagoz, a young Turk from Adiyaman, was the brother of the man suspected of carrying out a similar attack in July in Suruc, a town in southern Turkey on the border with Syria, that killed 34 people.

The prosecutors' statement said that Alagoz, believed to have trained with ISIL in Syria, had travelled "from a neighboring country on our southern borders in order to carry out the attack".

Turkish media had earlier identified the second bomber as Omer Deniz Dundar, who had twice been to Syria.

The four remanded in custody on Sunday were part of a group originally detained due to suspicious posts on Twitter.