LOS ANGELES -- Lady Gaga's dog walker was shot and two of the singer's French bulldogs were stolen in Hollywood during an armed robbery, police said. The singer is offering a US$500,000 reward.

The dog walker was shot once Wednesday night and is expected to survive his injuries, according to Los Angeles Police Capt. Jonathan Tippett, commanding officer of the department's elite Robbery-Homicide Division. The man was walking three of Lady Gaga's dogs at the time, but one escaped. That dog has been recovered safely.

Tippett told The Associated Press that the dogs belong to pop star Lady Gaga. It's not yet clear if the dog walker was targeted because of his celebrity client, the captain said.

Lady Gaga is offering the reward for the return of her dogs -- whose names are Koji and Gustav -- with no questions asked, according to her representative. An email address for tips, KojiandGustavΓåògmail.com, has been set up. The singer is currently in Rome to film a movie.

Police were initially called to North Sierra Bonita Avenue, a street off the famed Sunset Boulevard, around 9:40 p.m. Wednesday following several 911 calls reporting a man screaming and the sound of a gunshot, said Capt. Steven Lurie, commanding officer of the department's Hollywood Division.

The victim, whose name has not been released, was walking the dogs when a white Nissan Altima pulled over and two men tried to steal the animals, police said.

"Two suspects exited the vehicle and demanded the victim turn over the dogs at gunpoint. The victim struggled with the suspects and was shot once by one of the suspects," a police statement said.

The suspects nabbed two of the three dogs and drove off in the Nissan sedan, the statement said.

Video captured by the doorbell camera of a nearby home shows the white sedan pulling up next to the dog walker and two men in dark clothing getting out.

Although most of the action is hidden by a front-yard fence, it appears the men struggle with the shouting walker. One man then pulls what appears to be a gun and a shot is heard before the men pile into the car and flee.

The walker is heard repeatedly screaming: "Oh my God! I've been shot!"

He cries "Help me!" and "I'm bleeding out from my chest!" as someone runs out of the house to his aid.

There was little evidence of the previous night's violence on Thursday afternoon in the upscale neighbourhood known as the Sunset Square historic district. There were faint blood spatters on sidewalk grasses and an errant black glove typically used by police left in the street. Neighbors, some of whom had doorbell security cameras, declined to comment on the shooting.

French bulldogs can cost thousands of dollars. A woman in San Francisco was beaten in January at gunpoint as three men stole her gray French bulldog puppy named Chloe, police said.

Gaga has remained among the biggest pop stars in the world since breaking through with her 2008 album "The Fame," known as much for her shape-shifting persona on stages and red carpets as for her danceable music and powerful vocal pipes.

She has won 11 Grammy Awards, headlined the Super Bowl's halftime show and has now become a bona fide Hollywood star after co-starring in 2018's "A Star is Born" with Bradley Cooper and winning an Oscar.

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AP Writers Mesfin Fekadu in New York and Andrew Dalton and photographer Chris Pizzello in Los Angeles contributed to this report