A hospitality worker is being commended as a hero for thwarting a “Vegas-style” massacre near the Major League Baseball All-Star Game in Colorado.

On July 10, a maid discovered more than 12 firearms and 1,000 rounds of ammunition inside an eighth-floor room at Maven Hotel in downtown Denver.

The room was just two blocks away from the Coors Field, which hosted the “Midsummer Classic” two days earlier–ahead of All-Star Game celebrations.

The Special Weapons and Tactics Unit raided the property, and closed Wazee Street to the public while Denver Chief of Police Paul Pazen and his detectives investigated the scene.

One witness claimed an automobile was loaded onto a flatbed. Three males and one woman were arrested and two vehicles seized and processed for evidence, according to the Denver Channel.

Denver Police Department confirmed Richard Platt, 42, was arrested for suspected firearms offenses, possessing a controlled substance with intent to distribute (two counts), and an arrest warrant from a different jurisdiction.

Gabriel Rodriguez, 48, was detained on suspicion of carrying the weapon of a past offender as well as a controlled substance with the intent to distribute.

Ricardo Rodriguez, 44, was jailed for weapons offenses while Kanoelehua Serikawa, 43, was held on suspicion of possessing a prohibited substance with intent to distribute. Serikawa also had an existing arrest warrant from another jurisdiction.

A key part of the investigation is a cryptic message that a recent divorcee posted to Facebook. It suggested he would “go out in a big way,” according to the New York Post.

Detectives will also factor in the amount of guns, ammunition, vantage location, and massive crowds. BL understands this deadly combination could have easily led to a Las Vegas-style shooting.

Pazen understands the general public’s safety concerns and promised investigators will work “tirelessly” to solve the case.

“We have the great fortune of having the All-Star Game in our beautiful city, and we want to reassure folks that all aspects of the safety department,” he said according to The Sun. “We have a very detailed and comprehensive plan to ensure the safety of our community members.”

Pazen thanked the hotel employee for doing the “right thing,” and reporting the large number of weapons to authorities.

“The investigation and arrests were the result of a tip from the public, serving as an excellent example of the critical role the community plays in public safety,” the department said in a statement.

Maven Hotel management applauded all of its employees, and the Denver Police Department, for swiftly responding to the maid’s report.

“We are incredibly proud that our team swiftly alerted the authorities in this instance,” the hotel said in a statement obtained by the Denver Channel. “We are thankful to Denver Police Department for their quick action to safely resolve this situation, and will continue to work closely with them to support their investigation.”

FBI agents confirmed they will work closely with local law enforcement officers during the special event. They were still cooperating with the Denver Police Department to investigate the possible attack at the time of publication.