Officers are looking for answers after they found materials to make meth behind a local high school.
Police said a bag was found by a janitor near a dumpster in a fenced area behind South Central High school.
Inside the bag they found a water jug with a chunky material at the bottom and a white bottle with a hole at the bottom.
Officers said the principal contacted police because he thought it looked like a "mobile meth lab."
Bismarck Police Department said the materials tested positive for methamphetamine.
The case is still under investigation.