HARLEYSVILLE GROUP <HGIC> SEEKS TO ACQUIRE FIRM Harleysville Group Inc said it was in talks to acquire Atlantic Mutual Fire Insurance Co, a property and casualty insurer licensed in five southern states. The company said it believes an acquisition could be completed by June 30, subject to approval by regulatory and Atlantic Mutual policyholders. Harleysville plans to invest about four mln dlrs in the business if the deal is completed.