Four adolescents were killed when a train smashed into a school bus on a level crossing outside the town of Perpignan in southwestern France on Thursday. The bus was split into two. Another 20 people were injured in the crash, 11 of them seriously, according to French Prime Minister Edouard Philippe, who traveled immediately to the scene. Most of the injured were schoolchildren aboard the bus, aged 13-17. The bus and train drivers both survived and will be interviewed by police.