Borussia Dortmund were forced to evacuate their main offices on Wednesday after receiving a "suspicious envelope with white powder", which turned out to be icing sugar.
Emergency services were called to the building in Rheinlanddamm after a number of Dortmund employees noticed a white substance, with Ruhr Nachrichten reporting that 40 firemen were called to the scene.
Tests were conducted in a mobile laboratory, which determined that the substance was harmless.
"Big thanks to the Dortmund fire department!" the club said. "We received a suspicious envelope with white powder today. For security reasons, we evacuated the building completely for about one hour.
"The powder was analysed twice in a mobile chemical laboratory. We got the result at 17:20: icing sugar! All Borussen are now back at work."
Danke und Gruß an die ! Alles gut! Alle Infos: March 15, 2017
