Germany's foreign intelligence agency recorded at least one phone conversation held by US Secretary of State John Kerry, a German magazine reported.
Der Spiegel cited unnamed sources as saying Germany security agents had intercepted Kerry's words when he was in the Middle East negotiating between Israelis, Palestinians and Arab states last year.
But the intelligence agency spokeswoman told Reuters Germany was not tapping the phones of allied countries and said the United States was not a target.
Germany's foreign minister has said he would go to the limits of what is "legally and politically possible" in terms of arming Iraqi Kurdish fighters.
He said he would ask what the Iraqi government expects of Europe on an upcoming trip to the country, and then decide how to proceed.
The £60 million settlement in Bernie Ecclestone's bribery trial may seem a lot of money, but it leaves the road clear for one of sport's biggest operators to carry on exerting control over the world of Formula 1.
ITV News Sports Editor Steve Scott reports:
Formula One boss Bernie Ecclestone has to pay $100 million (£60m) as a settlement payment in his bribery trial, a Munich district court said.
A spokesman for the court said the suspicion against the 83-year-old was largely not substantiated.
The bribery trial against Formula One boss Bernie Ecclestone will be discontinued for the moment, a Munich district court said.
The announcement comes after the 83-year-old offered to pay a £60 million settlement to end the trial.
Bernie Ecclestone's defence lawyer has said it is "do-able" for the Formula 1 tycoon to pay out £60m within a week.
A district court in Munich said Mr Ecclestone, 83, had offered to pay the cash to end a trial for bribery.
The state prosecutor told the court that Mr Ecclestone's age and other circumstances meant they would support the offered settlement.
The billionaire could face up to 10 years in jail and have to give up control of his business if he is found guilty.
A spokeswoman for the Munich court pointed out that under German law settling the case with a payout did not amount to an admission of guilt.
"With this type of ending a procedure there is no ruling on guilt or innocence of the defendant," she said.
"He is neither acquitted nor judged, rather this is a special type of ending a procedure which is in theory available to all types of cases."
Formula One boss Bernie Ecclestone has offered to make a $100 million (£60m) payment in order to end a trial on bribery charges, a court in Germany heard.
State prosecutors in Munich said they would agree to accept the offer, according to Reuters.
The 83-year-old went on trial in April over allegations he bribed a former German banker as part of the sale of a major stake in the motorsport business eight years ago.
Ecclestone's age and other circumstances supported the acceptance of a settlement, the state prosecutor said.
The British billionaire could have faced up to 10 years in jail and would have had to cede control of a business he has built up over the past four decades.
This archive image shows Adolf Hitler in the crowd hearing the announcement of the First World War on August 2, 1914.
After Nazi Germany became a reality, Hitler mentioned that he had been outside Field Marshals' Hall in Munich when the declaration of war was revealed.
A German photographer then went through his old pictures of the event and found the image.
Hitler was 25 years old when the First World War broke out. He enlisted in the Bavarian army and rose to the rank of lance corporal, but no further.
Germany's Mesut Ozil has paid for the surgeries of 23 children as a "thank you" to Brazil for its hospitality during the World Cup.Read the full story ›
The appointment of Jean-Claude Juncker as European Commission president is a "very good sign" for Europe's ability to act, German Chancellor Angela Merkel said, after a meeting with leaders of south east European countries in Croatia.
Ms Merkel added: "I would like to congratulate Jean-Claude Juncker on his election as EU president with a clear result in the first round of voting [...] It will inspire us to resume the work with the European commission."