In Russia, at least nine people were killed and 13 others hospitalized after a pair of gunmen reportedly opened fire at a school in the city of Kazan. Russian media reported one of the shooters — believed to be a teenager — was arrested by police while another attacker was shot dead by security forces. School shootings are very rare in Russia. Immediately after Tuesday’s assault, President Vladimir Putin said he had ordered Russia’s government to immediately begin work on tightening gun ownership regulations.