Two people were arrested Thursday, the opening day of the festival, and 10 more people were arrested Friday, according to Melissa Stratton, a spokeswoman for the city's Office of Emergency Management and Communications. Another 29 people were issued citations - almost all for fence jumping and trespassing - during the festival's four-day run.

Additionally, 128 people have been transported to hospitals for treatment by paramedics, Stratton said. A total of 49 people were transported on Sunday, 57 on Saturday, 56 on Friday and 72 on Thursday.

Chicago police say they recovered over 60 cellphones after arresting a suspect who is believed to have been stealing mobile devices from concertgoers at Lollapalooza over the weekend.

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Last year, 12 people were arrested over the course of the festival - the first time it was extended to four days - while 34 people were arrested over three days in 2015.

Concert organizers encouraged anyone whose phone was stolen to report it on the event's website, lolla.com/lostfound, where festivalgoers can also search the inventory of unclaimed items.