LAS VEGAS (KLAS) — The man convicted for making a bomb and killing another man outside a Las Vegas Strip resort escaped from prison Friday night, Nevada Department of Corrections officials said Tuesday evening following questions from the 8 News Now Investigators.

Porfirio Duarte-Herrera, 42, was serving a life sentence without the possibility of parole at the Southern Desert Correctional Center for the murder of Willebaldo Dorantes Antonio, records showed. The prison is about 40 miles northwest of Las Vegas in the rural community of Indian Springs.

Corrections officers determined Duarte-Herrera was missing at 7 a.m. Tuesday, officials said in a news release. A search for him began around 8 a.m., NDOC officials said in the release.

Las Vegas Metropolitan Police Department announced Wednesday morning it would assist the U.S. Marshals in attempting to locate Duarte-Herrera. Police said in a Tweet, “He is a convicted murderer and should not be approached. If you see him, please call 911 immediately.”

Duarte-Herrera created a dummy — possibly out of cardboard — leaving it in his prison cell to help throw off prison staff, multiple sources told 8 News Now Investigators Vanessa Murphy and David Charns.

The 8 News Now Investigators first reported the escape around 11 a.m. Tuesday. It was not until after 1 p.m. that NDOC officials issued a news release on the matter, confirming the 8 News Now Investigators’ earlier reporting.

Porfirio Duarte-Herrera, 42, is serving a life sentence without the possibility of parole for murder at the Southern Desert Correctional Center, records showed. (NDOC/KLAS)

In a statement issued Tuesday around 5:30 p.m., Nevada Democratic Gov. Steve Sisolak said Duarte-Herrera had “been missing since early in the weekend.”

Around 6:15 p.m. Tuesday, NDOC clarified that Duarte-Herrera had in fact escaped Friday.

Duarte-Herrera is described as being 5 feet 4 inches tall, weighing 135 pounds. He has brown hair and brown eyes.

The crime scene as seen from above the parking garage. (KLAS)

“This is unacceptable,” Sisolak said in a statement. “My office has ordered NDOC to conduct and complete a thorough investigation into this event as quickly as possible. This kind of security lapse cannot be permitted and those responsible will be held accountable.”

Duarte-Herrera and Omar Rueda-Denvers were convicted in 2009 for killing Dorantes Antonio, who died when the bomb, hidden in a coffee cup, exploded. The incident happened at a parking garage at the Luxor hotel in 2007.

The incident was targeted and not random, prosecutors said.

A spokesperson for Las Vegas Metro police said the department was aware of the missing convicted murderer and officers were being vigilant.

U.S. Marshals were assisting in the search.

NDOC officials said Duarte-Herrera should be considered “dangerous.”