Fatal Attack on Brazilian Teacher by Student and 5 Others.

A 13-year-old student in Sao Paulo, Brazil, fatally stabbed a 71-year-old teacher and wounded three teachers and two fellow students in a knife attack at a public school. The suspected attacker was detained, and the state's military police are investigating. The attacker had insulted another student last week, and the female teacher he fatally stabbed had tried to settle the conflict. The boy had searched for ways to obtain a firearm on the internet, authorities said.