BELGRADE, Serbia (AP) — The European Union on Tuesday expressed concern over reports of violence during local elections in Serbia on the weekend and called on President Aleksandar Vucic ‘s authorities to punish the attackers. The EU delegation in Serbia — a candidate nation for membership in the 27-nation bloc — cited findings of international monitors who said they had witnessed violence and irregularities during Sunday’s balloting. “We regret the number of reported irregularities and