Las Vegas, NV (KTNV) -- Las Vegas police searched an apartment on Bruce Street, near Fremont Street, in downtown Las Vegas on Sunday night.
Other media outlets began reporting early on that the search could be related to Sunday morning's shooting of two police officers in the eastern part of the valley. However, the Las Vegas Metropolitan Police Department has not confirmed that information.
The search began shortly before 9 p.m. Sunday at the Oak Tree Apartments.
Krista Koch, who lives near the apartment that was searched, told Action News the apartment was occupied by the couple who is accused of shooting two Las Vegas police officers and another person on Sunday morning.
According to Koch, the couple would often talk about killing police officers and were very anti-government.
The neighbor also told Action News the man would often dress up as the "Joker" and "Slender Man" and the woman would dress up as "Harley Quinn."
In addition, Koch says that the neighbor told her that they were going "underground" before carrying out an attack. Koch identified the man as "Jared" and told Channel 13 that she just thought the couple was "crazy" and did not realize their intentions were serious.
The "Joker" is a comic book super villain, who is portrayed as a criminal mastermind. He was the arch enemy of "Batman." James Holmes, the man who shot and killed 12 people at a movie theater in Aurora, Colorado, dressed up as the "Joker" during that shooting.
"Slender Man" has most recently been associated with the stabbing of a 12-year-old girl by her 12-year-old friends in Wisconsin. The girls allegedly stabbed the girl because they wanted to meet the fictional character made popular by the website Creepypasta.com.
"Harley Quinn" is also a fictional character in the "Batman" comic book series. She is the girlfriend of the "Joker."
Several apartments were evacuated and Bruce Street was closed from Charleston to Fremont during the search and investigation.
Loud noises, which may have been flash bangs, were heard shortly before 10 p.m. A reporter on the scene for Channel 13 also said smoke could be observed in the area.
LVMPD said they will not be releasing any information to the public until Monday's briefing on Monday morning.