BERLIN (Reuters) - A Hamburg daily that reprinted satirical cartoons from French newspaper Charlie Hebdo was hit by arsonists at the weekend, raising security concerns in Germany on the eve of a planned mass rally against Islam in the city of Dresden. Islamist militant attacks on Charlie Hebdo and a kosher deli in Paris this week that killed 17 people have fuelled fears of similar assaults in other European countries and prompted a warning from German Interior Minister Thomas de Maiziere.