UPDATE Friday 12:00 p.m.
Authorities say heroes helped save lives during a deadly shooting at a New Mexico high school.
San Juan County Sheriff Ken Christesen told reporters Friday that a substitute teacher heard the gunshots Thursday morning at Aztec High School but didn't have a key to lock the door to the computer lab.
So she took students into an office or storage area and barricaded the door with a couch.
He says 21-year-old William Atchison came to the room and yelled that he knew they were in there and then fired multiple shots into the room.