Stuttgart (dpa / lsw) - Weakly radioactive waste water has leaked from a defective pipe in the Stuttgart Clinic. Four employees briefly came into contact with the sewage on Thursday and had to change their clothes. According to the fire brigade, they were unharmed, and there was no danger to patients either. The emergency services stopped the waste water and found no increased readings outside the affected changing room. Ambulances drove to other hospitals to be on the safe side, but the emergency room continued to operate.