Four children have been killed and at least five others injured after a 25-year-old man armed with a small axe attacked a pre-school in the southern Brazilian state of Santa Catarina. A man with a hatchet jumped over a wall and invaded a daycare center on Wednesday in Brazil, killing four children and wounding at least five others, authorities said. The assailant turned himself in at a police station and did not appear to have any connection with the center, which offers nursery services, pre-school education and after-school activities. The dead were between the ages of five and seven, authorities said. Investigators were searching for a motive, a police detective told television reporters in Blumenau, a city in southern Brazil, near the Atlantic coast. Images broadcast on networks showed weeping parents outside the private daycare center called Cantinho Bom Pastor. Amid rumours on social media of other potential attacks, Blumenau’s mayor, Mário Hildebrandt, said the city suspended classes and will declare a 30-day mourning period. The mayor said five wounded children, aged between three and five, were taken to hospitals. One was in serious condition. School attacks in Brazil have happened with greater frequency in recent years. Last week, a student in São Paulo fatally stabbed a teacher and wounded several others. Brazil has seen at least one past attack on a daycare center. That attack also occurred in Santa Catarina state, in 2021, when an assailant used a dagger to kill three children under two years old and two adults. From 2000 to 2022, 16 attacks or violent episodes happened in schools, four of them in the second half of last year, according to a report from researchers led by Daniel Cara, an education professor at the University of São Paulo. The researchers prepared the report for the government of President Luiz Inácio Lula da Silva. “There is no greater pain than that of a family who loses its children or grandchildren, even more so in an act of violence against innocent and defenseless kids,” Lula wrote on Wednesday on Twitter. “My thoughts and prayers are with the families of victims and the community of Blumenau in the face of the monstrosity of what occurred.” Blumenau, a city of 366,000 people, is famous for its annual Oktoberfest festival.