(Associated Press) Fake marijuana likely contaminated with rat poison has killed three people in Illinois and caused severe bleeding in more than 100 others, including a few in four other states.

The federal Centers for Disease Control and Prevention has alerted doctors nationwide that patients with severe, unexplained bleeding may be additional cases.

The CDC is helping Illinois authorities investigate the outbreak in that state, which began in early March. Illinois reported seven more cases on Tuesday, bringing the nationwide total to at least 116.

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