It was learned that he too set himself on fire at the nursery school in Brazil.
A security guard in province of Minas Gerais, Brazil, has lost five lives as a result of an attack on a flammable substance. "We believe a security guard at the nursery set himself on fire and set fire to children in the kindergarten".
The office of Janauba's mayor decreed seven days of mourning.
He was taken to hospital with burns to around 90 percent of his body.
"As the creche is near our house we heard noise and rushed over", Nelson de Jesus Silva, the father of one victim, told Globonews TV.
It is understood the children who died were all aged four.
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Damiao Soares dos Santos, 50, was identified as the man who doused alcohol on a daycare in Janauba and set it on fire with people inside. The motive of the attack was unclear.
While Jane Kelly, the mother of Juan Miguel Soares expressed grief, "I woke him up early to bring him here and when I saw him again he was dead in the hospital".
He was reported to have mental health issues.
The guard had worked nights for at least eight years at the nursery school, where he was not directly in contact with the children. Evacuation would have been more hard.
While interrogation, Police officials found many alcohol bottles at his residence. "I want to express my sympathy to the families".
"I am very sorry for tragedy that led to death of 4 children in Janabua", said Brazilian president Michel Temer, social media.