The Islamic State – Khorasan Province (IS–KP), a South-Central Asia-based regional affiliate of the Islamic State, claimed responsibility in a statement through the Amaq News Agency shortly after the attack.
Amaq News Agency (Wikipedia)Amaq News Agency (Arabic: وكالة أعماق الإخبارية) is a news outlet linked to the Islamic State (IS). Amaq is often the “first point of publication for claims of responsibility” for terrorist attacks in Western countries by the Islamic State. In March 2019, Amaq News Agency was designated as a Foreign Terrorist Organization by the US Department of State.