Austria Comes to a Standstill to Mourn School Shooting Victims

GRAZ, Austria—Austria came to a standstill on Wednesday to mourn victims of one of the worst outbreaks of violence in its modern history, as authorities search for clues to why a 21-year-old gunman shot dead 10 people at his former high school before killing himself.

Police said the man had acted alone in Tuesday’s rampage, armed with a shotgun and a pistol. They are scouring his home and the internet to find out why he opened fire at the school in Austria’s second city of Graz, before shooting himself in a bathroom.