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.

Death toll from floods in northern Vietnam rises to 23
Flash floods triggered by heavy rains earlier this week also left 16 people missing and injured 21 others. As per the Central Natural Disasters Committee, at least 228 homes have been destroyed in the floods.

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.