Police officers armed with machine guns appeared in the Warsaw metro. In Poland, until November 30, the following threats are in effect: threat level Bravo II and threat level Bravo-CRP level II - throughout the country, as well as the threat level Bravo II for the Polish energy infrastructure outside the Republic of Poland, as well as the third level of alert Charlie in the areas of the railway lines operated by PKP Linskie Linie HutzaP Szerokotorowa. The Bravo alert level (second on a four-point scale) is activated in the event of an increased and expected threat of a terrorist incident. This means that the services have information about a potential threat, so the public administration is obliged to show special vigilance. Not only the European Union - news from Europe.