The state government of Sao Paulosaid two teenagers, armed with guns and wearing hoods, entered the school and began shooting at students.
At the time of the shooting, reportedly, only secondary students were at the school.
However, current Brazilian President Jair Bolsonaro signed a temporary decree in January that made it easier for citizens to buy guns in an effort to overturn the strict regulations of the past. Reports indicate that two shooters, identified as 25-year-old Luiz Henrique de Castro and 17-year-old Guilherme Taucci Monteiro, took their own lives following the attack. More than 1,000 children aged between 11 and 15 attend classes there.
The assailants reportedly were former students of the school, yet the motive of the attack remains unclear.
Anxious family members congregated outside the school alongside firefighters and security services, an AFP photographer at the scene said.
Sao Paulo´s state military police department told AFP that "several people were shot" when "an individual" entered the institution in Suzano and opened fire.
According to local firefighters, one of the victims worked at the school, while the other five were students.
While gun laws are extremely strict in Brazil, it is not hard to illegally purchase a weapon.
The wounded student who took shelter in her house could not speak.
Police arrived eight minutes after the shooting started, and the attackers were already dead, Salles said. Castro's body lay near Monteiro's, with the crossbow on the ground between the pair.
Sao Paulo State Governor Joao Doria said four children and two members of staff were among the dead.
"I was shocked with the scenes I saw inside that school".
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