The truck attack killed 84 people in Nice on France’s national holiday.
Amaq quoted an IS security source as saying one of its “soldiers” carried out Thursday’s carnage “in response to calls to target nations of coalition states that are fighting (IS)”.
Four men believed to be linked to the Tunisian man who killed 84 people when he drove a truck into a Bastille Day crowd in Nice were arrested overnight Saturday, a judicial source said.
One of the men being held was arrested Friday and three others on Saturday morning, the source added.
The driver’s estranged wife is also still being held by police.