Poland is investigating disruptions to train traffic from unauthorized radio signals

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FILE - Ukrainian refugees embark a train bound to Warsaw, at the Przemysl train station, southeastern Poland, on March 11, 2022. Polish security authorities are investigating multiple cases of disruption to railway traffic, after unauthorized radio signals stopped several trains over the weekend. On some of the signals, the Russian national anthem could reportedly be heard in the background. (AP Photo/Petros Giannakouris, File)