Taylor Hampton's Mark Lewis is set to file a US class action against News Corporation relating to allegations of phone-hacking and police bribery by News of the World staff.

Lewis – who represents a number of phone-hacking victims such as the family of murdered schoolgirl Milly Dowler – has instructed New York civil liberties lawyer Norman Siegel to assist him on the action.

Lewis and Siegel are planning to file the legal action in the next week. Siegel, a former director of the New York Civil Liberties Union, has previously acted for victims of the 9/11 disaster.

The duo are expected to launch the claim under breach of American foreign corruption laws.

Lewis said: "It is incumbent upon a lawyer to ensure that they give the best advice to their clients in relation to all legal options."

The news comes after Lewis was called to appear in front of the Parliamentary committee investigating phone-hacking by chairman John Whittingdale earlier this month. Lewis is expected to appear in front of the committee on 19 October this year.

News International adviser Farrer & Co has also been asked to appear in front of the committee.

Elsewhere, a group of News Corp shareholders led by Amalgamated Bank engaged in a lawsuit against News Corp chief Rupert Murdoch filed a second amended complaint in the Delaware Chancery Court this month.

The shareholders have extended their claims of "rampant nepotism and failed corporate governance" to include "computer hacking, privacy breaches and extreme anticompetitive behaviour on the part of two News Corp US subsidiaries, News America Marketing and NDS".

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