President Barack Obama has dispatched two senior advisers to Germany in an apparent effort to soothe tensions following new allegations of American spying.
The White House says chief of staff Denis McDonough and counter-terrorism adviser Lisa Monaco are in Berlin for meetings with their German counterparts. The White House says intelligence and security matters were in the agenda.
The meetings follow the discovery earlier this month of two alleged US spies in Germany, prompting Chancellor Angela Merkel to demand the departure of the CIA station chief in Berlin.
The allegations follow revelations that the US National Security Agency was conducting mass surveillance of German citizens and eavesdropping on Ms Merkel's cellphone.
The White House says the US and Germany agreed to set up a dialogue to address intelligence concerns on both sides.