Visitors gather outside the British embassy in Berlin, Germany, on Nov. 6, 2013. Germany's Foreign Minister Guido Westerwelle invited the British ambassador to the conversation in the Federal Foreign Office on Tuesday afternoon relating to a newspaper report about spying from the UK embassy in Berlin. (Xinhua/Zhang Fan)

A pedestrian walks by the British embassy in Berlin, Germany, on Nov. 6, 2013. Germany's Foreign Minister Guido Westerwelle invited the British ambassador to the conversation in the Federal Foreign Office on Tuesday afternoon relating to a newspaper report about spying from the UK embassy in Berlin. (Xinhua/Zhang Fan)