Video filmed by Twitter user @mrTtourist shows smoke rising from the fire.
According to DW, firefighting efforts were being hampered due to “the threat of further explosions and flying debris.”
DPA cited police as saying the site was used to dispose of ammunition in a controlled environment, and it was unclear how the explosion happened.
The fire spread in the extremely dry conditions, as a city-wide heat warning was in place for a second day in a row. Credit: @mrTtourist via Storyful