There were two "confirmed deceased adult males" and one woman transported to a hospital, the Thornton Police Department said on Twitter about two hours after first reporting the incident.
![Malaysia military helicopters crash. [The Social Being, X]](data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'100'%20height%3D'100'%20data-ring-placeholder%3D'1'%3E%3C%2Fsvg%3E "Malaysia military helicopters crash. [The Social Being, X]")
"Multiple parties down. Please stay away from the area," they warned in their initial post.
Police later said it was "NOT an active shooter" situation, indicating the threat had passed.
A spokesman for the Denver-area Thornton Police Department could not be immediately reached by AFP.
Last month, a gunman in Las Vegas killed 58 people in the country's worst mass shooting in recent history.
More than 33,000 gun-related deaths occur annually in the United States, according to a study released this month.
Eyewitness? Submit your stories now via social or:
Email: eyewitness@pulse.ng
![The 10 warmest years have occurred since 2007 [Black Doctor]](data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'300'%20height%3D'172'%20data-ring-placeholder%3D'1'%3E%3C%2Fsvg%3E "The 10 warmest years have occurred since 2007 [Black Doctor]")
