The freeway runs parallel to the Las Vegas Strip.
Elliott says six vehicles were involved in the apparent chain-reaction crash, including two Las Vegas police vehicles, two civilian vehicle and two Capitol Police vehicles.
Elliott says four tow trucks were summoned. It’s not clear whether anyone else was injured.
Officials in Reid’s office said it wasn’t immediately clear where the Democratic Senator was headed, but first lady Michelle Obama is set to give a speech in Las Vegas Friday afternoon, and Reid’s wife Landra was speaking at the event.