The St Mary police are investigating a series of suspected arson incidents in the Rock River area of Richmond, which occurred between Friday and Saturday of last week, resulting in significant property damage. Police sources said that on Friday, August 21, about 3:30 a.m., residents were alerted after fire was allegedly set to several vehicles and a business establishment in the community. The police said that despite efforts to contain the blaze, two motor vehicles and a bar were destroyed.