New York State Parks Police got an anonymous call around the same time as the previous call. That caller claimed that men with AR-15-style rifles would soon be arriving at the same casino, the report added. Niagara Falls Police sent officers to the casino. No chemicals were found during a check of one hotel floor, in a hotel room, and in the property’s air filtration system, WIVB reported. No armed men were at the gaming property. As of this weekend, no one was arrested for the incident.