Comment by JHof

Interesting that they intercepted after only 15 minutes. Maybe the aircraft had crossed the border without making contact. In the US, airliners accidentally lose contact for close to this time period quite frequently. To reestablish, the controllers will sometimes have a fellow company ship relay a message with the correct frequency via ACARS, or the lost aircraft can listen on 121.5 until someone calls with the correct frequency. I suppose in Europe this would be considered a more critical issue due to the frequent border crossings.