with that scene caught on camera. Police bursting through the doors on a man playing video games looking for an active shooter. What they found was s.w.a.t.'ing. ABC's Clayton Sandell has the story. I... See More
with that scene caught on camera. Police bursting through the doors on a man playing video games looking for an active shooter. What they found was s.w.a.t.'ing. ABC's Clayton Sandell has the story. I think you're getting s.w.a.t.'d. Reporter: They're searching for the 911 caller who brought S.W.A.T. Teams on this unsuspecting gamer. Bursting into this Littleton, Colorado, video game company Wednesday guns drawn as the whole thing streams live online. The caller stated that he had just shot multiple people. Reporter: Officers thinking they had an active shooter set up a perimeter evacuating businesses, locking down nearby schools, but police now believe it was all a hoax, a disturbing prank called s.w.a.t.'ing. Take this fake 911 call a couple years ago. I'm going to shoot someone else soon. Reporter: That one sending cops to Miley Cyrus' front door. Now police say video gamers are making the phony calls to get S.W.A.T. Teams racing to the homes of their opponents. This is not a game. It's not an online game. We have real guns with real bullets and there's a potential for tragedy. Reporter: It's becoming so common that Jordan matthhewsonmathewson, the s.w.a.t.-ee told other players he knew exactly what was happening. I think we're getting s.w.a.t.'d. Reporter: His fellow players watching the incident unfold on twitch, a site where anonymous spectators can watch video games played realtime. Could have been any one of the thousands watching. They like the anonymity of being online and being able to get away with stuff and they like to test that sometimes. Reporter: The real caller's identity is still unknown but police are promising when they find them, it's game over. For "Good morning America," Clayton Sandell, ABC news, Denver. They just got to stop doing that. There are real consequences. This is real life, not a game.
This transcript has been automatically generated and may not be 100% accurate.