A gunman shot and killed multiple people at a Dallas-area mall before he was fatally shot by a police officer who happened to be nearby, authorities said.At least eight people were killed and several others were wounded on Saturday in the latest episode of gun violence in the US.

A gunman shot and killed multiple people at a Dallas-area mall before he was fatally shot by a police officer who happened to be nearby, authorities said.At least eight people were killed and several others were wounded on Saturday in the latest episode of gun violence in the US.