Officials at Chicago's Blackstone Hotel are confirming that Las Vegas shooter Stephen Paddock booked rooms with a view of Grant Park during Lollapalooza this summer, but never showed up.
There's no evidence Paddock ever came to Chicago during the August music festival.
Authorities say Paddock also booked rooms with a view of a September music festival in Las Vegas that included Chicago's Chance the Rapper on its bill.
Chicago police will only say that they're communicating with federal law enforcement agencies.
Paddock assembled an arsenal in his room at the Mandalay Bay Hotel in Las Vegas and rained gunfire on an outdoor concert crowd Sunday, killing 58 people and injuring more than 500.