I heard about it while in Vegas, but haven't seen much in the news. While watching the Bellagio fountain show on Saturday, I spoke with a cop who said the suspected bad guy(s) were pulled over for speeding and driving erratically shortly after the incident. They arrested these guys as there was a bulletin out that fit the suspect(s) description. I know few details beyond this.
The cop said that police believe that cheap room rates are bringing more "undesirables" to the area. I would say from the crowd mix that this is likely true. Downtown has also seen a change in the crowd.