By CBS 2 Chicago Staff

CHICAGO (CBS) — Hours after fans cleared out of Grant Park and Lollapalooza ended, cleaning crews moved in.

Their mission was to pick up all the bottles, wrappers and other trash piled up on the festival grounds.

There is no word yet on the amount of damage, but there is usually some work to patch up the grass.

Concert organizers typically pay for those repairs.

CBS 2 Chicago Staff