The attack which also injured 50 others has sent shockwaves throughout the country and indeed the world as all of the children killed in the attack were aged four.
The episode led to the deaths of two girls and four boys, all of whom were 4 years old, and injured 25.
THESE are the first pictures of six young children and a teacher who were burned to death in a suspected arson attack on a nursery by a mentally ill security guard. The guard, who was aged about 50 and identified as Damiao Soares, died in the hospital several hours after the incident, which left him with burns all over his body, Santos said. He went to the Gente Inocente childcare centre to hand in his medical certificate and then started the fire, O Globo newspaper reported.
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It is known that DOS Santos set fire to the building in which there were about 80 people.
Following this, the security guard died after succumbing to his own burn injuries. "I want to express my solidarity with the families".
President Michael Temer tweeted: "I'm very sorry about this tragedy involving children in Janauba". Local media outlets reported that Santos had been working at the day care center since 2008 and was recently fired.
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The motive of the attacker remains unclear.
Mayor of Janauba, Carlos Isaildon Mendes, confirmed that the teacher, named as Helley Abreu Batista, died from her injuries after being taken to hospital.
As the father of a school-age child, Mr Temer said he understood "this must be an extremely painful loss" for the parents.
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