Scuffles and fistfights broke out between ruling party and opposition lawmakers in Serbia’s parliament on Monday over a deadly rail station roof collapse that has ignited tensions in the Balkan state. The opposition wanted to discuss who is responsible for the crash that killed 15 people in the northern city of Novi Sad on Nov. 1. The collapse has fueled widespread anger toward the government and protests, becoming a flashpoint for broader dissatisfaction with Serbia’s authoritarian rule.