The Las Vegas Strip was blocked off after a car mowed down as many as 20 pedestrians Sunday night, authorities said.
Rows of ambulances gathered at the scene, their lights flickering in the night. A witnesses described a chaotic scene as people fled.
"Everyone was running ... and as I was running, I saw a car up on the sidewalk coming to toward us," a witness told CNN affiliate KLAS. "I saw a lady, she didn't seem like she wanted to stop the car, she had both hands on her wheel."
The witness said people tried to stop the driver.
"I saw men running after her, yelling, 'stop, stop!' As she was passing, we saw people running after her. Everyone was so frantic and just running around."
Traffic snaked down the streets as cars were diverted near the Paris Las Vegas hotel, where the Strip was shut down.
Las Vegas authorities tweeted that Road closure on S. Las Vegas Blvd between Harmon and Flamingo Rd. while we investigate an injury crash," the Las Vegas Metropolitan Police Department tweeted.
No more information was immediately available.
Las Vegas Strip blocked off after accident - CNN.com