Emergency services responded to what investigators described as a “suspicious residential fire” in Woolwich Township early Tuesday morning. The fire was reported in the area of Sunset Place. Investigators believe the residence was vacant at the time of the fire. There have been no reports of physical injuries, according to Waterloo Regional Police. The circumstances surrounding the fire remain under investigation. Further information about the cause of the fire and the extent of the damage was not immediately available. Police encouraged the public to avoid the area.