One of Germany's biggest music festivals has been evacuated over a "possible terrorist threat".

Police say they're investigating and can't give exact background information at the moment.

The three-day Rock am Ring event - held at an arena near the southern city of Nuremberg - is scheduled to run until Sunday.

Rock am Ring festival: First images of the arena being evacuated https://t.co/MJSzo34UFQ pic.twitter.com/tDEAuA53en

— The Telegraph (@Telegraph) June 2, 2017

Rock am Ring: Police Interrupts Major German Music Festival Due to Terror Warning https://t.co/OzEHhP85Sf

— Variety (@Variety) June 2, 2017