Officials confirm attacker 's identity through forensic examination . Terror ##ist claims responsibility and criticizes Turkey for its support to the group . Sanli received bomb-making training somewhere in Europe in the mid-1990s , according to Hasan Selim Ozertem , a security expert at the International Strategic Research Organization in Ankara . ` ` E. Alisan Sanli has become a martyr , '' the group 's website says . Authorities have detained three people for questioning over the attack , semi - official media reports .
Officials confirm attacker 's identity through forensic examination . Terror ##ist claims responsibility and criticizes Turkey for its support to the group . ` ` E. Alisan Sanli has become a martyr , '' the group 's website says . Authorities have detained three people for questioning over the attack , semi - official media reports .