Four young children and a teacher have been killed in what is believed to be an arson attack at a nursery school in Brazil. He went to the Gente Inocente childcare centre to hand in his medical certificate and then started the fire, O Globo newspaper reported.
The guard, aged about 50, died in hospital several hours after the incident which left him "with burns all over his body", Santos said.
There were 80 children in the day care when the incident happened, and the police have confirmed four children and a teacher have died, while nine others are in a critical condition.
Fifteen victims with life threatening injuries have been sent to the capital Belo Horizonte where hospital facilities are better suited to cope than those in the small city where the tragedy occured.
The security guard is accused of dousing people inside the day care center with flammable liquid before starting a fire.. In some local media reports, it was suggested that Santos was sacked last month for health reasons, when he brought health report to daycare. The mayor of Janauba has declared seven days of mourning.
President Michel Temer expressed his sympathy to the families.
Mr Temer said that, as the father of a school-age child, he understood "this must be an extremely painful loss" for the parents.
Police visited the home of the suspect and his family members to try to determine a motive.