A black and tan coloured dog that appears to be a Shepard/Rottweiler mix in the Downtown/West end of the city is believed to have bitten two separate people on two separate occassions early this morning. Both individuals attended the hospital this morning to be treated for their injuries. The dog is black and tan in colour with a tan belly and it is not wearing a collar. Greater Sudbury By-Law has been contacted and Officers are assisting to search the area. If you see this dog, please indo not approach it and contact 311.