TMZ is reporting that a fan fell from an upper balcony during a Motley Crue's Tuesday performance in Indiana.
The man fell about 45 minutes into the show.
Police say they assisted an injured person who was "awake and breathing."
They also said they were investigating whether he was extremely intoxicated before leaning over the railing and falling to the lower level.
The victim was taken to a hospital but his condition is currently unknown. Motley Crue hasn't commented yet.