German Chancellor Angela Merkel has complained to President Barack Obama after learning that US intelligence may have targeted her mobile phone.
According to the Miami Herald, she told the president that it would be "a serious breach of trust" if the claims were true.
Obama said that US is not listening in on Merkel's phone calls now but failed to say that it had not done so in the past.
A White House spokesman sort of implied that the US ruled the world now and if it had not been for them, the Germans would be speaking German.
White House spokesman Jay Carney said that the United States greatly values its close cooperation with Germany on a broad range of shared security challenges. We guess he was referring to them both needing to know Merkel's password.
German news magazine Der Spiegel, which has published material from NSA leaker Edward Snowden, found proof that the US hacked Merkel's mobile.
Merkel said among close partners such as Germany and the US, "there must not be such surveillance of a head of government's communication".
The White House is conducting a review about how it gathers intelligence after it became clear that it seemed to be spending rather a lot of dosh snooping on people who were its friends, rather than enemies. France and Brazil have also made similar complaints.
As details of National Security Agency spying programs have become public, citizens, activists and politicians in countries from Latin America to Europe have lined up to express shock and outrage at the scope of Washington's spying.
The French were particularly miffed after a Paris newspaper reported the NSA had swept up 70.3 million French telephone records in a 30-day period.