Five people have died after an 18-year-old man launched a machete attack at a nursery school in southern Brazil town.
Police say the victims include three children all reported to be under two years old and two staff members.
Several dozen children were in the building at the time of the incident and staff tried to hide them.
A fourth child is said to have suffered minor injuries.
Police say the man first attacked a teacher who was at the entrance to the nursery.
He then reportedly followed her into one of the rooms, where he also turned on the children.
They added the attacker turned the weapon on himself and is in critical condition in hospital.
At a news conference later on Tuesday, one police officer described the attackers weapon as “samurai-style” and displayed it to reporters.
Three days of mourning have been declared in Santa Catarina state.
While there have been deadly machete attacks in schools before in Brazil, they have mainly targeted older pupils: