He was found badly hurt on the ground. The male was transported to the hospital with a serious head injury. There is no immediate info on his status or identity. No motive for the assault is know now and there are no reported suspects at this time.
It is rare that a crime like this is quickly reported by the media (especially when it occurs near the LV Strip), but it's refreshing to get this news story. So often, and likely for public relations reasons, many stories like this are not covered.
Las Vegas is by no means a super dangerous city, especially in the main tourist spots, as Metro presence is good, and hotel security on whole, is efficient. However please be careful out there--locals and tourists alike.