Pete Doherty broke a microphone stand and brandished it before fans during a Babyshambles concert at the Piper club.
Concert organizers said Doherty broke the stand and "threw it up in the air" Monday night, but did not say whether the stand hit anyone.
"During the concert the singer has interacted with the public 'in his own way,' but without causing riots or anything," DNA Concerti said in a statement.
Doherty also broke all the instruments onstage during the stormy concert, the daily Corriere della Sera reported Tuesday. No one was reported injured.
According to the newspaper, the band's drummer was hit by an object and forced to leave the stage. Doherty grabbed the microphone stand and brandished it before the fans standing in the first rows.
Doherty, 27, has had a string of arrests in London for drug possession and is undergoing a court-ordered rehabilitation program. He is the on-off boyfriend of Kate Moss.