An armed man walked into the casino and approached a popular poker cage, where he demanded money, before quickly fleeing out the north entrance, Las Vegas police said in an overnight press conference.
The suspect attempted to carjack someone at the valet but was confronted immediately by four uniformed officers. A second officer returned fire, striking the suspect.
"The officer had his bulletproof vest on, which probably saved his life," Las Vegas Police Department Capt. Nichole Splinter said. He was treated and released, police said.
The suspect was also struck in the chest. The man, who was not identified, died a few hours later, police said.