Bureau to investigate claims News of the World journalists sought to hack into phones of victims of 9/11, reports say

The FBI has opened an investigation into allegations that News of the World journalists tried to hack into the phones of victims of the 9/11 attacks in New York.

The launch of the FBI inquiry amounts to the first official inquiry within the US into News Corporation activities. The move brings the scandal within Rupert Murdoch's British newspaper division closer to his American home and to News Corporation's headquarters in Manhattan.

The announcement of an FBI inquiry followed a mounting chorus from politicians and relatives of 9/11 victims calling for a review of the allegations. Peter King, the Republican chairman of the homeland security committee in the House of Representatives, on Wednesday wrote to the director of the FBI, Robert Mueller, and asked him to open an investigation into the 9/11 allegations.

In his letter, King said he represented a district of New York that lost more than 150 constituents in the terror attacks. "If these allegations are proven true, the conduct would merit felony charges, and any person found guilty should receive the harshest sanctions available under law."

The claim that Murdoch journalists attempted to get hold of victims' phone details was made by the Mirror newspaper, which based the story on an unnamed former New York police officer working as a private detective, who was said to have been approached by News of the World reporters asking him to retrieve the private phone records of the dead.

The detective was reported to have declined to take up the commission.

It is unclear at this early stage in the investigation whether there is any substance to the Mirror's allegations. But relatives of 9/11 victims expressed delight and relief that the FBI had stepped in to clear up the issue.

Sally Regenhard, whose firefighter son Christian died in the World Trade Centre, said: "I'm very happy. The FBI is being very responsive in acting on our call for a full investigation."

Jim McCaffrey, a New York firefighter who lost his brother-in-law Orio Palmer, also a firefighter, on 9/11, also welcomed the FBI inquiry. "If these claims are found to be true, I think it's a terrible revelation and very, very upsetting to 9/11 family members," he said.

Even if the information contained in the Mirror article could be verified, there might be a problem with moving forward with an investigation because the events were so long ago. Several legal experts, including a former top lawyer for the FBI, said that prosecution under federal wiretapping laws is subject to a five-year statute of limitations.

While the FBI inquiry gets under way, News Corporation also faces the prospect of possible prosecution under other US laws. Several Congress members have called for the company to be held accountable under the Foreign Corrupt Practices Act, a federal law that punishes firms based in the US that engage in bribery abroad.

It has emerged that News of the World staff paid police officers in the UK in the course of their phone-hacking activities.