At least three people were killed and three others were injured by a gunman at the Grand Sierra Resort casino in Reno, Nevada, on Monday, authorities said.Reno Police Chief Kathryn Nance and Sparks Police Chief Chris Crawforth were among a number of officials who held an afternoon press conference to provide an update on the shooting,

Four of the men shot outside of the Grand Sierra Resort were visiting Reno for a bachelor party. All of the men graduated from Thousand Oaks High School more than a decade ago. Amanda Starrantino reports.