News Corp chairman and chief executive Rupert Murdoch has accused internet giant Google of aiding film piracy.

The Australian-born media mogul used his recently activated Twitter account to blast the search engine, branding it a "piracy leader".

Rupert Murdoch: Small stake, huge say. Credit:Bloomberg

"Piracy leader is Google who streams movies free, sells advts around them," Murdoch wrote.

A short time later he added to the rant, saying film making was "risky as hell", with piracy hurting actors and writers.