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In the deadliest mass shooting in recent American history, more than 58 people, including an off-duty Las Vegas police officer, were killed near the Mandalay Bay Resort and Casino in Las Vegas on Sunday. More than 500 people in the crowd of 22,000 were injured as musician Jason Aldean performed at a country music festival.

The gunman, identified as Stephen Paddock, 64, is believed to have killed himself, and police say his motives remain unknown.

A spokesperson for the Las Vegas Clark County Coroner's Office told BuzzFeed News the office was not confirming the names of victims to media at this time.

Here is what we know about the victims of the attack who have been identified so far.

Quinton Robbins

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Quinton Robbins, whose death was reported by family members on social media, was a 20-year-old student at the University of Nevada-Las Vegas. Friends described him as the "sweetest, most genuine boy," saying "it wasn't [his] time to leave this earth."

Kilee Sanders, Robbins's aunt, told Newsweek she was "at a loss," because his death was "so sudden." In a Facebook post, Sanders called Robbins "the most kind and loving soul" with a "contagious laugh and smile."

Another family member wrote on Facebook to thank Quinton for being a positive influence on his life. "There were so many times growing up when I was in a situation and thought to myself, what would Quinton do," he wrote. "I wouldn’t be who I am today without you."

Originally from Henderson, Nevada, Robbins "loved fishing and hunting," according to Valori Houser, 19, who attended high school and served on the student council with him. Houser told BuzzFeed News in a message that Robbins "had lots of friends" and was always a "friendly face in the crowd."

One friend wrote on Twitter that Robbins was "suppose[d] to be our best man and god father one day. Dreamt of kids playing t-ball together and growing up together."

And Tyce Jones, a family friend, told Newsweek that Robbins coached his little brother’s flag football team and was a "pay-it-forward-kind-of guy."

Sonny Melton

Sonny Melton / Facebook / Via Facebook: sonny.melton.7

A registered emergency room nurse at Jackson-Madison County General Hospital in Tennessee, Sonny Melton attended the Las Vegas concert along with his wife, Heather Gulish Melton, who confirmed his death to USA Today.

"I want everyone to know what a kind hearted loving man he was but at this point I can barely breathe," she wrote in a statement to the newspaper. Melton told local media that her husband had saved her life during the attack.

A resident of Big Sandy, Tennessee, Melton was remembered by those who knew him as "a great guy to be around" and "an amazing person and amazing nurse" on social media.

Melton was a graduate of Union University, completing his Bachelor of Science in Nursing Accelerated degree in 2015. He served as president of his class. In a tribute on Facebook, Christy Davis, assistant professor of nursing, said Melton “had a sweet, kind spirit about him.”

“You know how when you met someone and you just know that they’re good and kind? That was Sonny,” she wrote.

Jordan McIldoon

Facebook / Via Facebook: jordan.mcildoon

Canadian Jordan McIldoon, from Maple Ridge, British Columbia, would have turned 24 on Friday, according to a relative who spoke with the Huffington Post.

His parents, Al and Angela McIldoon, confirmed his death to Canadian outlet CBC News.

"We only had one child," they said. "We just don't know what to do."

McIlldoon worked for Jacob Bros Construction in Surrey and attended the concert with his girlfriend. His parents said they had received calls from both their son’s girlfriend and Las Vegas paramedics, and that they were receiving support from the Canadian Consulate.

“We’re just all in shock,” McIldoon’s employer, Paul Simpson, told Canada24 News. “He’s a mechanic for us. We’re just in shock here.”

A family member told the Huffington Post McIldoon was just one month shy of completing a course to qualify as a heavy-duty mechanic and that relatives were traveling to Las Vegas to retrieve his body.

Jessica Klymchuk

Multiple Canadian news outlets reported Jessica Klymchuk, a single mother of four from Edmonton, Canada, was killed in the attack while visiting Las Vegas with her fiancé.

This is a developing post, please check back for updates.

LINK: Live Updates On The Mass Shooting In Las Vegas

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