Two teenagers killed at Sacramento mall in Black Friday shooting

• Teens, 19 and 17, die after up to a dozen shots fired
• Police say attack appears targeted and isolated

Police are looking for a gunman who shot and killed two teens at a northern California mall in the midst of Black Friday, sending shoppers running for safety, authorities said.

Arden Fair Mall in Sacramento was evacuated shortly after 6pm when shots were fired near one of the mall's entrances, a police spokesman, Karl Chan, said.