(CNN)ISIS has claimed responsibility for the deadly New Year's attack at an upscale Istanbul nightclub which left 39 dead.
As authorities in Turkey continue their search for the attacker, the terror group offered no further clues about the identity of the assailant. The claim -- made in a statement posted to Twitter -- cannot independently be verified by CNN.
"In continuation of the blessed operations which ISIS carries out against Turkey, a soldier of the brave caliphate attacked one of the most popular nightclubs while Christians were celebrating their holiday," the statement posted to Twitter reads.
Those killed in the attack hailed from 14 countries, including India, Morocco, Jordan, Canada, Russia, Tunisia, Saudi Arabia and Kuwait.