A wave of bomb warnings on European planes Bulgaria announced the emergency landing of three planes in the country due to bomb threats in Italy Two warnings were issued about the presence of bombs on two planes on the route from Rome to Milan Al Jazeera announced the emergency landing of a Polish plane on its way from Warsaw to Brussels after reporting a suspicious incident. The Czech police announced the emergency landing of four planes at the Prague airport after receiving bomb threats. A passenger plane also made an emergency landing after receiving a warning about the presence of a bomb at the Eurobase in France. AFP: Since this morning, 12 warnings about the presence of bombs have been issued at airports in Europe.