Jan 20 (Reuters) - Rupert Murdoch's News Corp said rumors about the company's interest in buying microblogging site Twitter Inc or building a stake in it were untrue.

Twitter's shares rose as much as 14 percent to $19.04 after unconfirmed chatter on Twitter and Stocktwits.

(Reporting by Anya George Tharakan in Bengaluru and Jessica Toonkel in New York) ((anyageorge.tharakan@thomsonreuters.com; within U.S. +1-646-223-8780; outside U.S. +91 80 6749 7118;; Reuters Messaging: Reuters Messaging: anyageorge.tharakan.thomsonreuters.com@reuters.net))

Keywords: TWITTER M&A/NEWS CORP