MOSCOW—A gunman with a swastika on his teeshirt killed 13 people, including seven children, and wounded more than 20 at a school in Russia on Monday before committing suicide, investigators said. Russia’s Investigative Committee, which handles major crimes, said it was looking into the attacker’s suspected neo-Nazi links. It named him as Artem Kazantsev, a…

MOSCOW—A gunman with a swastika on his teeshirt killed 15 people, including 11 children, and wounded 24 at a school in Russia on Monday before committing suicide, investigators said. The attacker, a man in his early thirties who was named by authorities as Artem Kazantsev, killed two security guards and then opened fire on students…