German industrial giant BASF (BASFY) is investigating the cause of an explosion Monday that left some staff injured at one of its chemical plants in Ludwigshafen, Germany.

The blast occurred shortly before mid-day local time and was initially followed by reports that some staff members were missing and that others had been injured. Reports indicate the explosion and subsequent fire took place at a river harbor used to unload flammable liquids and liquid gasses. 

City officials in in the central German town, which sits around fifty miles south of Frankfurt, said via social media feeds that emergency services were attending to the scene.

BASF stock was little changed in response to the news, with the shares changing hands around €78.60 euros shortly after news of the accident began to circulate.