Sao Paulo state authorities say eight people have been killed in a school shooting in Brazil, including two student shooters.
Governor of Sao Paulo, Joao Doria, condemned the "cruel murder" The official arrived at the shooting scene shortly after the incident.
The public school, Raul Brasil Professor, has more than 1,600 students from elementary to high school grades, teachers gathered outside said.
Website UO1 said the two killers, "probably teenagers, entered the school shooting with their heads covered by a hood".
The men, identified as former students at the school in a suburb of Sao Paulo, also shot and killed the owner of a used auto business nearby before launching the attack on the school, authorities said.More news: College admissions cheating scheme: 3 weird details from the complaint
School shootings are rare in Brazil, although the country is one of the world's most violent, with more annual homicides than any other.
Far-right President Jair Bolsonaro made relaxing gun control a cornerstone of his campaign previous year.
Marcelo Salles, commander of police forces in Sao Paulo state, spoke just outside the school and said that in his over three decades of service, he had "never seen anything like this, it was an unspeakably brutal crime".
"I heard a lot of screaming", she said.
In 2011, 12 students were killed by a gunman who roamed the halls of a school in Rio de Janeiro, shooting at them.More news: Watch Will Smith Rap 'Friend Like Me' In the 'Aladdin' Trailer
Gun laws have been extremely strict in Brazil since 2003 when former leftist President Luiz Inacio Lula de Silva signed measures that prevented ordinary citizens from carrying guns.
The wounded student who took shelter in her house could not speak.
"It's a very sad scene, the saddest thing I've seen in my entire life".
Speaking a few blocks from the public school in Suzano, Mr Doria said: "The school is on lockdown".More news: Ireland will give United Kingdom more time but 'Brexit is Britain's problem'