A Belgrade court has sentenced three Serbs each to 10 days in jail for putting up anti-Semitic posters in the Serbian capital. The posters, depicting the Star of David, were plastered in downtown Belgrade earlier this month and were signed by a hitherto unknown group calling itself the "National Order". The posters were aimed against the popular independent "B92" radio and TV station, describing it as "anti-Serb" and with a negative influence on Serbia's youth, spreading "Western diseases" in the Balkan republic. The three men, aged between 19 and 21, started serving their sentences on Wednesday, local police said in a statement. Serbia has seen a surge of anti-Semitism in recent years, fueled by nationalists who claim that all the republic's problems stem from powerful Jews who allegedly advocate anti-Serb policies in the United States and elsewhere in the world.