ANN ARBOR (WWJ) – The all-clear has been given following a hazmat situation at St. Joseph Mercy Hospital in Ann Arbor.

It began when a patient arrived at the hospital after ingesting rat poison.  The poison reportedly caused the patient to emit potentially harmful gasses. 

As a precaution, a special machine will conduct environmental samples periodically over the next 24 hours to ensure a safe environment for patients and staff.