After two drug-related deaths at Electric Zoo in 2013, organizers of the dance-music festival plan to crack down this year with drug-sniffing dogs, thorough pat-downs and undercover security officers with backgrounds in narcotics investigations.

Those are among the new safety measures that promoters Mike Bindra and Laura DePalma said they will introduce at the three-day event, which they have hosted for the past five years on Randall's Island.

...