Turkish Vice President Fuat Oktay said on Sunday the blast in Istanbul's popular pedestrian avenue that killed six and wounded 81 was confirmed to be a terror attack.
The vice president stated that "we evaluate this to be an act of terror, carried out seemingly by a female assailant."
He added that "we will find those who are responsible, even if they run to the end of the world."
An explosion hit the busy Istiklal Avenue on the European side of Istanbul at 4:20 p.m. local time (1320 GMT) on Sunday, causing huge panic in the city.
Law enforcement agencies are on high alert, with police officers guarding key points and helicopters patrolling over the city.
According to the prosecutor's office, five prosecutors have been assigned to investigate the explosion.
Produced by Xinhua Global Service
