The ISIS-linked news agency Amaq said in a statement released through its Telegram account on Saturday, “The person who carried out the operation in Nice, France, to run down people was one of the soldiers of the Islamic State. He carried out the operation in response to calls to target nationals of states that are part of the coalition fighting the Islamic State.”
The claim must be greeted with caution. The Islamic State has in the past asserted responsibility for attacks carried out in its name, even when there was no sign of its direct involvement…. The group has intentionally blurred the line between operations that are planned and carried out by its core fighters and those carried out by sympathizers inspired to commit violence only from a distance.
New York Times reporter Rukmini Callimachi noted on Twitter that the amount of time ISIS took to claim responsibility for the attack is unusual (typically they do so within a day), but the group has occasionally taken longer, as in the case of the San Bernardino attack.
7. Most of the attacks they carried out in last year took less than 1 day, including Metrojet crash over Sinai on Oct 31 and Paris on Nov 13— Rukmini Callimachi (@rcallimachi) July 16, 2016
12. So if we use time of claim as a metric for how clued in ISIS is to a given operation, Nice falls on the outer perimeter.— Rukmini Callimachi (@rcallimachi) July 16, 2016