An explosion has been reported outside a reception centre for refugees in Germany. A suitcase filled with aerosols was thought to be the source of the apparent blast outside the Bundesamtes für Migration in Zirndorf, Bavaria, on Wednesday afternoon, Bayerischer Rundfunk reported. But Bavaria Police denied an explosive device was used in a message on Twitter, and said no one was injured. "Forces on the ground. No acute danger in the surrounding area," the post read.