 A teacher in Brazil has died after a 13-year-old student stabbed her alongside three other teachers and two classmates at a public school in Sao Paulo City, local authorities said on March 27. The teenager has been taken to a police station to be interrogated alongside his parents. The other teachers affected are not at risk and the injuries to students were minor, said Sao Paulo's secretary of education, Renato Fader, who added a three-day mourning period will be declared in honor of the teacher who died. Fader said it is too early to speculate on the motive for the attack and that police will investigate. A physical education teacher at the school restrained the student, preventing him from injuring others.