Police in Bethlehem are urging residents to be on the lookout after some meth-making materials were discovered in the city.

Officials say a citizen called police after finding bottles on the west side of Bethlehem.

Police say they're gas generators and they're used during the production of meth.

Officials say if you see one of the bottle you should not touch it.

Moving the bottle can spark a chemical reaction and harmful gas vapors may leak out.

If you come across a bottle, call 911 immediately.