Roger Waters releases statement as police investigate concert costume

Roger Waters performs at Barclays Arena in Hamburg, Germany, on Sunday May 7 (Daniel Bockwoldt/dpa/AP)

Pink Floyd co-founder Roger Waters has spoken out after police in Berlin opened an investigation into a costume he wore when he performed in the German capital.

Images on social media showed Waters firing an imitation machine gun while dressed in a long, black coat with a red armband.