The West Virginia Democrat is concerned that 9/11 victims may have had their phones hacked, and has issued a statement:

The statement by Senator Jay Rockefeller, a White House ally and Democratic chairman of the Senate Commerce, Science and Transportation Committee, dramatically raises the stakes for Mr Murdoch by signaling potential legal repercussions in America.
“The reported hacking by News Corporation newspapers against a range of individuals – including children – is offensive and a serious breach of journalistic ethics,” he said in a statement issued following inquiries by The Daily Telegraph.
“This raises serious questions about whether the company has broken US law, and I encourage the appropriate agencies to investigate to ensure that Americans have not had their privacy violated.
“I am concerned that the admitted phone hacking in London by the News Corp. may have extended to 9/11 victims or other Americans. If they did, the consequences will be severe.”
US ethics earlier on Tuesday called on the Senate and House of Representatives to investigate the parent company of News International and hold “thorough public hearings” on whether the voicemails of Americans had been hacked.

Full story at the Telegraph.