Unexploded WWII bomb found near Dortmund's Signal Iduna Park

Just hours before Dortmund trainer Jürgen Klopp was due to give his press conference ahead of the derby against Schalke, a 250 kilogram (550 pound) unexploded bomb of British origin was discovered near Borussia Dortmund's stadium, the Signal Iduna Park. With a 250 meter safety radius, both the stadium and the fan world had to be evacuated as well as everyone living in the area. "The area is sparsely populated. Nevertheless, we've got to make sure that there's no one inside the restricted area. Especially in the Bolmketal garden district," said city spokesman Hans-Joachim Skupsch to Ruhr Nachrichten. As was confirmed by a statement on the Dortmund county council website, the unexploded bomb was found on Thursday morning on a construction site after analysis of an aerial photograph. Disposal and safe defusing of the bomb are planned for Thursday afternoon. Borussia Dortmund said in a statement on the club's website they don't know how long the area in and around the stadium will be closed off for, Kazinform refers to DW.DE . The ground below many German cities remains littered with unexploded bombs dropped by Allied and Soviet forces during the Second World War. Most of the bombs are safely defused, but with hundreds of thousands of aerial photographs from the Second World War, it's hard to pinpoint exact locations. In Germany's capital, Berlin, authorities believe 3,000 bombs still remain undiscovered, and experts warn that some of the munitions are growing increasingly dangerous as they rust and their fuses grow more brittle.