BETHESDA, Md., March 20, 2008 (PRIME NEWSWIRE) -- Immunomedics, Inc. (Nasdaq:IMMU), a biopharmaceutical company focused on developing monoclonal antibodies to treat cancer and other serious diseases, today reported the development of three new antibody-drug conjugates aimed at treating pancreatic, colon, and lung cancers. Preclinical results from the immunoconjugates were presented at the 6th International Symposium on Targeted Anticancer Therapies (TAT 2008) in Bethesda, Maryland.