The suicide bomber responsible for the attack in Istanbul on Saturday was identified as a Turkish-born man affiliated with the Islamic State (IS, formerly ISIS/ISIL) terrorist group, the Turkish interior minister has said.

The bomber was born in 1992 in the southern city of Gaziantep, Efkan Ala told the media on Sunday. He was identified by his DNA as Mehmet Öztürk and had no previous criminal record.

He said five people have been arrested in connection with the bombing, which killed four people and injured over 30.

“We have determined that Mehmet Ozturk, born in 1992 in Gaziantep, carried out the heinous attack on Saturday in Istanbul. It has been established that he is a member of Daesh,” Efkan Ala told the media, referring to the IS by its derogatory Arabic acronym.