Serbia’s government said on Thursday it had taken a series of measures to prevent possible school violence, a day after a 13-year-old boy shot and killed eight students and a security guard at an elementary school in Belgrade, Reuters reported.

The gunman took a gun that belonged to his father and went to the school, where he killed nine people and wounded six students and a teacher before surrendering to police.

Serbian President Aleksandar Vučić said that due to his age, the boy cannot be prosecuted under Serbian law, but will be placed in a psychiatric hospital.

The government said in a statement that it had decided to stop issuing licenses to gun owners. The Ministry of Justice will prepare changes to the criminal legislation to bring to justice those who allow children access to weapons.

The government has instructed the Ministry of Justice to amend legislation to lower the age of criminal conviction to 12 from the current 14, and to set up expert groups to tackle peer violence in schools, the statement said.

He also said he would create a child online safety task force to consider banning certain sites.

The government will also change legislation within a month to allow schools to test pupils for drugs and alcohol.