News Corp denies rumors company wants to buy Twitter

Twitter's shares have risen on rumours that it is becoming viewed as an acquisition target, as unconfirmed chatter about News Corp interest circulated

Rupert Murdoch's News Corp said rumors about the company's interest in buying microblogging site Twitter or building a stake in it were untrue.

Twitter's shares, which rose as much as 14%, pared some gains and were up 5.2% at $17.55 in late afternoon trading. The rumors had lifted the stock from a record low.