Police are trying to find two men who they say stole 43 propane tanks from two industrial sites in the last week, and have alerted their Homeland Security division as a safety measure.

Lt. Dennis Rosenbaum says the division has been alerted because of the number and size of some of the tanks taken "out of an abundance of caution."

Police have also released surveillance video showing two men pulling up to one of the businesses in a Ford Escape and a 1990s Dodge or Chrysler minivan.

Police say some of the tanks could hold as much as 100 pounds of propane.

Lt. Rosenbaum says police just "want to make sure it's nothing sinister." He said they are treating them as industrial thefts, "unless we come up with something else."