Serbian President Aleksandar Vucic stepped down as the country's head of state Sunday, paving the way for him to run as his right-wing populist Serbian Progressive Party's candidate for prime minister in the October parliamentary elections.

A referendum has been held in Switzerland on whether Swiss neutrality should be more strictly enforced in the Constitution. Richard Werly, Europe correspondent for the Swiss publication Blick, tell us why the Swiss have voted "no".

Tensions are running high in Northern Ireland after the High Court in Belfast approved a controversial parade. Around 2,000 protesters have blocked the route into a Catholic area where the Protestant march was due to pass. It is the first time in nearly 30 years that the Orange Order has been allowed to march along this route, which was a notorious flashpoint before the 1998 Good Friday Agreement largely brought an end to the bloodshed of the Troubles. UK Prime Minister Andy Burnham has appealed for calm on all sides, saying he does not want to see Northern Ireland “go backwards.”

British police said they had evacuated homes Sunday near the air base of Fairford in southwest England used by US air forces and arrested five men over suspected explosives offences. British counter-terrorism police are investigating the incident.

A court in Northern Ireland has allowed a Protestant parade to proceed through a controversial route in a Catholic area for the first time in nearly 30 years. The legal dispute ended in the early hours of Sunday, with counterprotests now underway and police working to keep marchers and protesters apart. The Drumcree parade dispute dates back to the mid-1990s, when tensions over the route led to riots, roadblocks and murders, threatening Northern Ireland’s peace process. Hervé Amoric reports from Portadown.