At least 50 people are dead and another 200 have been injured after a gunman, Stephen Paddock, opened fire on a country music festival with an automatic weapon. He is understood to have fired from the 32nd floor of the Mandalay Bay hotel as festival-goers watched Jason Aldean perform.
23-year-old Robson, who burst onto the tennis scene by winning the Wimbledon Juniors championship in 2008 and has since won an Olympic silver medal, posted images on Instagram of her attendance at the concert and replied to one post on Twitter asking how she was.
Las Vegas shooting – in pictures
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"I'm okay. We were right there.. [it] sounded like fireworks at first then everyone started running. Scary s***," Robson wrote on Twitter.
Robson, the current world number 249, most recently played in the International Tennis Federation tournament in Templeton, California last week.
She lost to Taylor Townsend of the United States in the quarter-finals.
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