AT LEAST four children have been killed after a man armed with an axe went on a rampage at a nursery in Brazil. The 25-year-old man arrived at the preschool in Blumenau on a motorbike before leaping over the wall and storming the building. Footage shared online showed emergency services at the scene The school was for infants up to the age of two. Video footage shared online shows emergency services outside the school as parents escort their kids away. Other footage too horrifying to show appears to show bodies under sheets in the playground. A fifth child is said to be in a serious condition while four other casualties were taken to Santo Antonio Hospital. Police said a 25-year-old man responsible for the attack had been arrested, without providing further details.