Stoltenberg,'suspected Russian spies expelled from NATO' - Breaking news. "We are taking measures to make it more difficult for Russian intelligence services to carry out illegal activities between NATO countries or within them," he added.

"In effect they were carrying out activities that were not diplomatic, but intelligence," said Stoltenberg in an interview with Bild. Reproduction of this article is limited to this article. For more information, visit: www.dailymail.co.uk.