I remember that report... and like you, I tried to find more on it too. Nothing. Probably a slang word for something else.
But, a can of tomatoes? Ok... to get it into something canned and likely to be opened. Do they have or are they going to take over a canning facility? Maybe beer? Psssst... nobody notices and just figures you had too much to drink. (j/k)
Wasn't it cyanide they were referring to? Some type of cyanide gas. Man I sure miss the archives. I will look and see if that isn't one I saved somewhere.
I think the "sinsinem" referred to cyanide crystals.