SAN DIEGO & RIVERHEAD, N.Y.–(BUSINESS WIRE)–Shareholder rights law firm Robbins Arroyo LLP announcesthat a class action lawsuit has been filed against Suffolk Bancorp (NYSE: SCNB) in the Supreme Court for the State of New York, County of Suffolk. The complaint is brought on behalf of shareholders of Suffolk for alleged breaches of fiduciary duties in connection with the acquisition of the …