Minister Efkan Ala said the bomber was Turkish citizen Mehmet Ozturk, who was born in 1992 in Gaziantep province, which borders Syria. He said Ozturk was not on any list of wanted suspects and five other people were detained as part of the investigation.
Yesterday's explosion killed five people, including Ozturk, and wounded dozens of others. Among the fatalities were two American-Israelis, another Israeli and an Iranian.
The attack targeted Istanbul's pedestrian Istiklal Street, which is lined with shops and cafes in an area that also has government offices and foreign missions.
Turkey has endured six suicide bombing attacks in less than a year. The country faces a wide array of security threats including from ultra-left radicals, Kurdish rebels demanding greater autonomy who currently are locked in battle with security forces in the southeast, as well as the Islamic State group.
Turkey is also a partner in the US led coalition against IS and its air bases are being used to launch bombing runs against the group in neighboring Syria.
Ala said Turkey was determined to press ahead with its fight against terror groups but admitted it was difficult to prevent suicide attacks.
"We are working so that they do not happen," the minister said.
