Teacher dies trying to prevent shooting at middle school

A teacher at Sparks Middle School in Sparks, Nev., was shot to death while trying to persuade an armed student to put down his weapon. The Reno Gazette-Journal reports that Michael Landsberry, a math teacher, was shot by a 13-year-old student armed with a semi-automatic handgun. Two other students were wounded, and the armed student subsequently shot himself to death.

Video from CBS News: MORE: View a Facebook page created to honor Michael Landsberry. EARLIER: A student at a middle school in Sparks, Nev., opened fire on campus, wounding two boys and killing a staff member who was trying to protect other children. The Associated Press reports that the lone suspected gunman also was dead, but it was unclear whether the student committed suicide.