An unarmed security guard at Las Vegas' Mandalay Bay Resort and Casino was the first to take on gunman Stephen Paddock, getting shot in the process, but providing crucial help for police looking to stop the massacre. 
 
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 The security guard, identified as Jesus Campos by the International Union, Security, Police and Fire Professionals of America, was shot in the leg after Paddock fired at him through a door, police said. 
 
 Police said Paddock managed to fire off over 200 rounds as the security guard approached the suspect's room alone. But the guard managed to direct police to the exact location of Paddock's suite and even provided a hotel key to officers looking to clear rooms on the 32nd floor before they insisted he get medical attention. 
 
 Reached by phone Wednesday night, Campos told ABC News, "I'm fine." 
 
 The guard who found the shooter and helped bring the massacre to an end said, "I was just doing my job." 
 
 Campos provided information over the phone that helped authorities locate the 32nd-floor room that Paddock was firing from, a spokesperson for the union said. 
 
 Drew Angerer/Getty Images 
 
 Campos was on "random patrol" as a security officer at the hotel when he found the shooter, said Liliana Rodriguez, who identified herself as a coworker of Campos' at Mandalay Bay on a GoFundMe page she set up for him. 
 
 Campos went to investigate a door alarm on the 32nd floor of the hotel when he "came under fire," Las Vegas Metropolitan Police Undersheriff Kevin McMahill said in a press conference Friday. 
 
 McMahill called Campos an "absolute hero" who was "doing his job, diligently." 
 
 "I can tell you that this was a remarkable effort by a brave and remarkable man," McMahill said. "We haven't done a good enough job recognizing his actions." 
 
 Campos was unarmed when he engaged with Paddock, the union spokesperson confirmed, which was first reported by The Daily Beast. 
 
 "Any one of us could have been in the position he was in," Rodriguez wrote. "Most importantly we are a home away from home and at the end of the day we are a team and we should all go home together." 
 
 Speaking Thursday evening, Clark County Sheriff Joseph Lombardo praised Campos, saying he aided officers in their search for Paddock. 
 
 Lombardo added that Paddock fired "well over 200 rounds" into the hallway when the security guard approached. Paddock had set up a camera in the hallway, apparently to watch for approaching authorities. 
 
 "It's amazing" that Campos didn't sustain more injuries, Lombardo said. 
 
 "His bravery was amazing," Lombardo added. "He gave our officers the key card for the room and then continued clearing rooms until he was ordered to go seek attention." 
 
 On Sunday, about 22,000 concertgoers were attending the final night of the Route 91 Harvest Festival on the Las Vegas Strip -- across the street from the Mandalay Bay hotel -- when Paddock began his deadly assault. 
 
 It took authorities just minutes to locate where the bullets were coming from after the attack rang out. Once police breached the door to Paddock's suite on the 32nd floor of the hotel, they found him dead of an apparent self-inflicted gunshot wound. 
 
 A total of 58 people were killed and hundreds were injured in the attack. A motive is still not known, but police said the shooting was "obviously premeditated." 
 
 ABC News' James Hill and Michael DelMoro contributed to this report. ||||| An unarmed security guard was hailed for his "amazing heroism" after he prevented America's worst mass shooting from being even more deadly. 
 
 Jesus Campos was the first person to reach the sniper's lair on the 32nd floor of the Mandalay Bay Hotel where killer Stephen Paddock was blockaded inside a room with an arsenal of high powered weapons. 
 
 Most guards at the hotel are unarmed and it was believed Mr Campos had nothing more than a baton with him when he approached alone. 
 
 Paddock shot through the door, hitting him in the right leg, and then strafed the corridor with an incredible 200 bullets. 
 
 Despite being injured Mr Campus radioed in where the shooter was. He then refused to leave before evacuating guests from rooms on the same floor. ||||| My name is Lilly. I am raising funds to assist Jesus Campos a co-worker, that was injured during the tragic Las Vegas shooting. Unfortunately he was shot while on random patrol. 
 
 Funds will be used to provide relief and financial support for him while he gets back on his feet. This is a young man that I work with day in and day out. Any financial support would be appreciated for the time he would need to recover. Any one of us could have been in the position he was in. Most importantly we are a home away from home and at the end of the day we are a team and we should all go home together.
– One of the most amazing stories of heroism to emerge from the Las Vegas mass shooting is that of Jesus Campos, an unarmed security guard who was the first to locate gunman Stephen Paddock. Union chief Dave Hickey says Campos arrived at the 32nd floor of the Mandalay Bay hotel by elevator because Paddock had apparently barricaded the stairwell doors, the Daily Beast reports. He was shot in the leg after trying to open the door of Paddock's hotel room, which had also been barricaded. The injured guard, who was carrying only a baton, radioed dispatch and told them where the shooter was. Clark County Sheriff Joe Lombardo says that after Campos approached, Paddock stopped shooting at the crowd below and fired more than 200 rounds into the hotel hallway, the Telegraph reports. The guard's "bravery was amazing," Lombardo says. "He gave our officers the key guard for the room and then continued clearing rooms until he was ordered to go seek attention." Campos is scheduled to undergo surgery to remove the bullet in his leg. "I'm fine," he tells ABC. "I was just doing my job." A GoFundMe campaign a co-worker started for Campos has raised almost $6,000. President Trump praised Campos during his visit to Las Vegas Wednesday, saying: "He did a good job, didn't he?"