A 16-year-old boy died Tuesday after being shot by a gunman who opened fire at a school in southern Brazil, bringing the death toll from the attack to two, authorities said.

The second victim died in the hospital of multiple organ failure, after being shot Monday at a primary and secondary school in the municipality of Londrina, the Parana state education ministry told AFP.

A 16-year-old girl was killed at the scene Monday when a former student arrived at the school saying he needed a transcript then took out a gun and began shooting.

The shooter was immobilized by a teacher, then arrested when police arrived, authorities said.

Brazilian media reports said he was 21.

A second man suspected of helping plan the attack has also been arrested, state officials said.

President Luiz Inacio Lula da Silva condemned the shooting Monday, saying such attacks are “something we can no longer tolerate in our schools or our society.”

His administration has announced a series of measures to increase security at schools and tackle social media content seen as promoting school violence.

Brazil, where school attacks were once a rarity, has seen an increase in such assaults recently.