Multiple attackers killed 12 people and wounded at least nine in a late-night mass shooting in Johannesburg, police said Wednesday, the latest in such attacks that have shaken the South African city. Police said they believe more than 10 suspects were driven in a minibus to an informal settlement in the Cleveland suburb of Johannesburg late on Tuesday night and once there, opened fire on people. South Africa has seen several high-profile mass shootings recently, including two in December that...