A photo of the alleged suspect has been circulating on the social media.
Las Vegas police said they had located the "vehicles in question, and we are confident we have located the female person of interest."
It was also reported police are seeking an alleged roommate of the suspect, Marilou Danley, for questioning.
The Las Vegas Metropolitan Police Department had responded to the shooting incident by launching a manhunt as scenes of the carnage were posted online.
Meanwhile, police said that over 50 people were killed and more than 200 injured in the incident.
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