The U. S. may have been eavesdropping on German Chancellor Angela Merkel's phone conversations for more than ten years.
That's according to German magazine Der Spiegel.
It reported on Saturday that Merkel's mobile phone has been listed by the National Security Administration since 2002, and that the phone was still on the NSA list weeks before Obama visited Berlin in June.
The magazine says the NSA's Special Collection Service -- or SCS - had marked her phone as "GE Chancellor Merkel".
It says it was not clear whether the SCS had recorded conversations or just connection data.
Another German newspaper reports that U. S. President Barack Obama had told the Chancellor he would have stopped the bugging, had he known about it.
Germany's outrage over the alleged phone tapping prompted Berlin to summon the U. S. ambassador last week for the first time in living memory.
The move was an unprecedented post-war diplomatic rift between the two countries.