ST. CLOUD (AP) - The FBI says it is assisting local police in the investigation into a man who stabbed and wounded eight people at the St. Cloud mall.

Like the police, Minnesota FBI spokesman Kyle Loven declined to say Sunday if investigators believe Saturday night's attack at the Crossroads Center mall in St. Cloud was a terrorist act.

Authorities say a man dressed as a security guard stabbed eight people and reportedly mentioned Allah and asked a victim if they were Muslim before attacking them.

The Islamic State group has claimed the attacker was one of its own, though it's unclear if the group planned or even knew of the attack ahead of time.

An off-duty police officer shot and killed the attacker.

None of the victims had life-threatening wounds.

Meanwhile, an Islamic State-run news agency claims the man who stabbed and wounded eight people at a mall in St. Cloud before being shot dead by an off-duty police officer was a "soldier of the Islamic State."

The IS-run Rasd news agency reported the claim on Sunday, saying the attacker had heeded calls from the extremist group for attacks in countries that are part of a U.S.-led anti-IS coalition.

It was not immediately clear if the extremist group had planned the attack or even knew about it beforehand. IS has encouraged so-called "lone wolf" attacks. It has also claimed past attacks that are not believed to have been planned by its central leadership.

All eight victims from Saturday's attack were treated at a hospital for wounds that weren't life-threatening.  Hospital spokeswoman Chris Nelson says five were treated and released, three were admitted as in-patients.