Manhunt after 3 shot outside US school

A gunman is being hunted after three students were shot outside a high school in Pennsylvania, US officials said.

SWAT teams surrounding a house nearby #Brashear #Pittsburgh following shooting at High School http://t.co/UOD1Q5RMSO via @PamelaOsborne

— Raphael Gluck (@einfal) November 13, 2013