Four killed in US shooting spree

A gunman killed three people in California on Tuesday, including at least one execution-style, in a series of shootings and carjackings before taking his own life, police said.
At least two other people were injured as the gunman fired randomly on other vehicles on a freeway, before he shot and killed himself near the city of Orange, south of Los Angeles.
The suspect was identified as 20-year-old Ali Syed, who was unemployed, had no criminal record, and was living at home with his parents and taking a class at a local college.