BRIEF-WhatsApp says has referred cyber breach to U.S. Justice Department

Facebook Inc: * WHATSAPP SPOKESMAN SAYS HAS REFERRED CYBER BREACH INCIDENT TO U.S. DEPARTMENT OF JUSTICE

* WHATSAPP SAYS ATTACK WAS "PRETTY SOPHISTICATED", NOT DISCLOSING NUMBER OF USERS AFFECTED -COMPANY SPOKESMAN * WHATSAPP: ATTACK HAS "ALL THE HALLMARKS OF A PRIVATE COMPANY WORKING WITH GOVERNMENTS ON SURVEILLANCE" Further company coverage: (Reporting by Steven Scheer and Ari Rabinovitch)