BELGRADE, Serbia (AP) — Serbia’s populist Prime Minister Milos Vucevic resigned Tuesday in an attempt to calm political tensions following weeks of massive anti-corruption protests over the deadly collapse of a concrete canopy. The canopy collapse in November, which killed 15 people in the northern city of Novi Sad, has become a flashpoint reflecting wider discontent with the increasingly autocratic rule of Serbia’s populist President Aleksandar Vucic. He has faced accusations of curbing democratic freedoms in Serbia despite formally seeking European Union membership for the troubled Balkan nation. Novi Sad Mayor Milan Djuric also will step down on Tuesday, Vucevic said. Vucevic’s resignation could lead to an early parliamentary election.