
Anti-terror police made their first arrests over the attack, which unleashed scenes of panic among party-goers at one of Istanbul’s swankiest venues and killed mostly foreign tourists.
The shooting took place just 75 minutes into 2017 after a bloody year in Turkey in which hundreds of people were killed in violence blamed on both IS jihadists and Kurdish militants.
In a statement circulated on social media, the jihadist group said one of the “soldiers of the caliphate” had carried out the attack on the Reina nightclub.
It accused Turkey, a majority-Muslim country, of being a servant of Christians, in a possible reference to Ankara’s alliance with the international coalition fighting IS in neighbouring Syria and Iraq.
This is the first time IS has issued a clear and undisputed claim for an attack inside Turkey, despite being blamed for several major strikes in Istanbul and other cities over the last year.