Story highlights Police say there's "no truth" to ISIS' claim of responsibility for attack that killed 37

"One has to be skeptical of the ISIS claim," CNN terrorism analyst says

(CNN) ISIS has claimed responsibility for an attack Friday at a casino in the Philippine capital that left 37 people dead; however, police continue to deny what happened was terror-related.

A lone gunman entered the Resorts World Manila early Friday, firing shots from an assault rifle and setting fire to gambling tables. Most of the victims are believed to have died due to suffocation from the smoke.

Philippine police have released these images of the heavily armed suspect in the Manila casino attack.

ISIS claimed that "Islamic State fighters carried out" the attack in a statement Friday by its Amaq News Agency. A follow-up statement from the group's east Asia division referred to only one attacker -- whom it named as Abou al-Kheir al-Arkhebieli -- and boasted about the number of "Christians killed or wounded" before he "took his life."

But police said there was "no truth" to the assertion.

"They can always claim whatever they want to claim," said Oscar Albayalde, police chief for the Manila area. "They have this reputation of claiming all atrocities all over the world to perpetuate themselves to gain global notoriety. There is no truth that the incident is a terror act."

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