The Allegan County Sheriff’s Office is putting out a warning regarding components used to make meth.

In a post to their Facebook on March 21, the Sheriff’s Office says that with warm weather arriving, people might be out and about picking up trash along roadways and in forested areas. However, some of these discarded bottles and cans could contain residue from the meth manufacturing process, and when they’re handled they could produce toxic fumes.

The sheriff’s office says that if you see any discarded containers with suspicious residue, leave them alone and contact authorities so they can be properly disposed of, or call Silent Observer.