100kg incendiary bomb causes wildfire in Germany (VIDEO)
Local residents and workers at a nearby construction site reported hearing a loud blast on Thursday before a plume of smoke started rising over the abandoned forest area, the German media reported.
Firefighters initially suspected a decommissioned power plant as the possible site of the explosion, but failed to find any signs of damage or flames during inspections.
The mysterious bang turned out to be an explosion of an old incendiary bomb at the nearby military range.
The nearly 120-square kilometer site was in use between 1952 and 1993, when much of eastern Germany was part of communist East Germany. The range was used by Soviet troops stationed there for testing weapons.
After the Soviet pullout, the Bundeswehr has been slowly clearing the area of unexploded munitions.
The bomb disposal on Thursday did not go as planned, as white phosphorous contained in the explosive device spilled out uncontrollably and caused a wildfire.
German firefighters were unable to properly deal with the fire because of the risk posed by the old bombs and shells. Instead they contained the fire and prevented it from spreading outwards.