As many as 20 people are feared dead after a gunman invaded a primary school in Rio de Janeiro and opened fire.
One witness told the Guardian he had seen between 15 and 20 children dead or seriously wounded inside the Tasso da Silveira primary school in western Rio.
"It is a massacre, a true massacre," said Roni de Macedo, a fireman who arrived on the scene shortly after the shooting began and dragged eight seriously injured children from the second floor classroom. "There is blood on the walls, blood on the chairs. There are 15 to 20 dead I think," said De Macedo, who was covered in blood