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A restroom at a Wal-Mart in eastern Indiana has been closed indefinitely after an employee discovered a working meth lab inside.

State police say a Wal-Mart employee alerted police after seeing a man he described as suspicious enter the restroom about 11:30 p.m. Thursday with a backpack and leave without it. The Star Press reports ( ) that members of a state police meth suppression team removed the dangerous chemicals.