The Russian ambassador to Finland, Pavel Kuznetsov, has been summoned to a meeting on Monday with Finnish state secretary Matti Anttonen over the disruption of Finland's global positioning system (GPS) signal during recent NATO war games."We don't have anything to hide here. Disruption is a serious matter which disturbs civil aviation. We will act towards Russia, we will discuss this and we expect answers," Finnish Foreign Minister Timo Soini said in a statement to public broadcaster Yle while on a state visit to the United States. The Finnish foreign ministry said on Thursday that the disruption of Finland's GPS signal during recent NATO war games came from Russian territory.