Three days of mourning declared across Serbiapublished at 12:40 British Summer Time 3 May 2023
Ružić says it is "unthinkable, how, when you see the scene of the incident, what the children have been through".
He says the government is proclaiming a three-day mourning period across Serbia starting from Friday 5 May until 7 May.
School will be suspended and there will be no classes today, and tomorrow they will start with a minute of silence, he says.