Sayfullo Saipov, 29, is accused of killing 8 people during a terror rampage in Manhattan this week.
The Uzbekistan has been charged with acting in support of ISIS by ploughing the hired truck down a well known riverside motorcycle path, crushing pedestrians and cyclists.
The terror group has now belatedly said that they are responsible for the attack, with out providing evidence.
It stated Saipov as “one of the caliphate soldiers” in a weekly issue of its al-Naba newspaper.
And the US president vowed to strike back at the jihadists.