Law enforcement and fire officials were investigating a potential threat on a plane at Denver International Airport on Monday afternoon, but police later said the threat was unfounded.
Frontier Airlines said crewmembers discovered what they described as “threatening notes” on a plane. Passengers reported seeing police officers and bomb units, including dogs, on and around the plane after it landed.
Frontier flight 3406 from Seattle was evacuated after landing at Denver’s airport around 11:15 a.m., about an hour after it was originally scheduled to land, according to Frontier’s flight tracker…