US urged to probe missing Belarusian with Russian link

Supporters of a missing Belarusian opposition figure have appealed to the U.S., Poland, the EU, and the U.N. to investigate his disappearance following a report that he was captured by Russian authorities. The figure vanished last year, and new evidence suggests Russian involvement in his detention. The case has drawn international attention amid ongoing tensions between Belarus and the West. The appeal seeks to pressure authorities to clarify his fate and ensure accountability.