(KMOV)-- The University of Missouri has finished its investigation into the explosion at Schweitzer Hall which injured four people.
The students in a chemisty class were studying bacteria that have intolerance to oxygen. When working with it, they need to create an oxygen free chamber by using nitrogen and small amounts of hydrogen, which turns any remaining oxygen into water.
Investigators believe that the cause of the explosion was the oxygen was not completely removed from the chambers, making the combination explosive.
The lab researchers and students are now taking steps to avoid having this happen in the future.
Everyone involved in the accident are doing well. The one person who was admitted to the hospital was released the following evening.
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