The object was captured from at least two camera angles shortly before 2:30 a.m. on Tuesday. It’s not clear what the object was, although it moved and hovered much like a drone.
“It didn’t fly over, it didn’t do any of that,” Chase Rhoads, a cleaner at Casino Queen, told Fox station KTVI. “It just appeared.”
The station called nearby Scott Air Force Base, which reported no unusual activity.
While many videos of unexplained lights are later found to have been manipulated, this one was also caught on the surveillance cameras at nearby Malcolm W. Martin Memorial Park:
“There’s something weird with that one,” Mike Buehlhorn, director of the Metro East Parks and Recreation District, told AP.
While the clip posted by Rhoads showed a blinking light, the angle captured by the park’s camera revealed a much steadier light. In fact, the park clip captured two unusual lights: the one over the arch and a light that dropped from the sky, which could be consistent with a drone landing.
The park also posted a longer, unedited clip on YouTube and asked for people to post their explanations in the comments.
“It’s definitely odd, to be dead center over a national monument like that,” said Rhoads. “If that was the White House, people would be all over that.”