Who is obstructing aircrafts’ family doctor in the Baltic?

.ON APRIL 29TH Finnair, Finland’s national airline, pointed out that it will suspend air travels to the eastern Estonian urban area of Tartu for a month. Last week 2 airplanes were actually compelled to reverse after their family doctor signals were disrupted. GPS playing has enhanced greatly in the Baltic area over recent two years.

Who is behind it as well as exactly how dangerous could it be actually?