LAS VEGAS (AP) — A strange monolith found jutting out of the rocks in a remote mountain range near Las Vegas has been taken down by authorities.

How it got there is still a mystery.

“It remains unknown how the item got to its location or who might be responsible,” Las Vegas police said Friday in a series of posts on X announcing the removal of the glimmering, six-foot-four prism.

Its discovery over the weekend, and quick removal because of public safety and environmental concerns, revived a pandemic-era mystery that captured the public’s imagination when similar objects began to appear around the world.

Members of the police department’s search and rescue team found the object near Gass Peak, part of the vast Desert National Wildlife Refuge where bighorn sheep and desert tortoises can be found roaming.

It was the latest in a series of mysterious shiny columns popping up around the globe since at least 2020.

In November of that year, a similar metal monolith was found deep in the Mars-like landscape of Utah’s red-rock desert. Then came sightings in Romania, central California, New Mexico and on the famed Fremont Street in downtown Las Vegas.

The otherworldly structures evoke the object that appears in the Stanley Kubrick movie “2001: A Space Odyssey.” All of them disappeared as quickly as they popped up.

The Utah monolith, believed to be the first in the series, had been embedded in the rock in an area so remote that officials didn’t immediately reveal its location for fear of people getting lost or stranded while trying to find it.

Authorities said the same concerns led them to tear down the latest monolith on Thursday afternoon.

It was illegally installed on federal land established to protect bighorn sheep and is home to rare plants and desert tortoises. The Desert National Wildlife Refuge, which is managed by the U.S. Fish and Wildlife Service, is the largest wildlife refuge outside of Alaska and can cover the state of Rhode Island twice.

Christa Weise, acting manager of the wildlife refuge, confirmed Friday that the monolith had been removed but said she couldn't comment on whether federal authorities have opened a criminal investigation.

The police department said the object was being kept “at an undisclosed location” while authorities try to figure out the best way to dispose or store the massive structure made out of a reflective sheet of metal that was molded around the prism and secured with rebar and concrete.

Photos accompanying the department's social media posts showed the object on its side after its removal, which left a large indent in the ground because the rebar had been buried deep into the dirt and rocks.

The department said it “discourages anyone from venturing off marked trails or leaving objects and items behind.”

“This poses a danger to you and the environment,” Las Vegas police said.