A gunman took six girls hostage at the high school in the Colorado mountain town of Bailey, using them as human shields for hours before he shot and fatally wounded a girl and then killed himself as a SWAT team moved in, authorities said.

A teenager accused of killing his father and then shooting two students at his former high school in Hillsborough, North Carolina, said today he had been obsessed for years with the mass killing at Columbine High School.

Relatives of Columbine High School massacre victims have expressed outrage over an internet game based on the 1999 attack.