The blast, which occurred within the early hours, was adopted by a fireplace, an announcement from police in Bavaria mentioned.
Three of the injured had been taken to the hospital with reasonable to extreme accidents, police mentioned.
About 1,800 individuals had been evacuated from components of Vohburg and from Irsching, simply to the west, and are being sheltered in a neighborhood health club, police mentioned. Residents have been instructed to maintain home windows and doorways closed.
Footage from the scene confirmed thick, darkish smoke rising from the refinery website.
Firefighters proceed to work to extinguish the blaze, police mentioned. Roads within the space have been closed by the fireplace division.