Aug 1 (Reuters) -

* TWITTER IS PROBING ELON MUSK'S SOCIAL CIRCLE IN BROAD LEGAL REQUESTS - WAPO

* TWITTER HAS SUBPOENAED INFORMATION ABOUT ELITE SILICON VALLEY INVESTORS CHAMATH PALIHAPITIYA, DAVID SACKS, AND STEVE JURVETSON - WAPO Source text: [https://wapo.st/3vBjO2j]