"I am shattered. All these kids are like our own", the teacher said.
According to an earlier News24 report, it was a walkway that collapsed and several people had been trapped under the rubble.
Another 19 pupils were seriously injured, while two suffered minor injuries and another two had already been released from hospital.More news: Knicks and Mavs Agree to Blockbuster Trade That Includes Kristaps Porzingis
"It is painful to see those tiny bodies in that state", he said.
Lesufi said the collapsed pathway bridge was now the subject of an investigation by the relevant authorities.
The Democratic Alliance (DA) on Friday joined the chorus of mourning for the three Hoërskool Driehoek pupils who died when a walkway collapsed at the school in Vanderbijlpark in southern Gauteng on Friday morning.More news: January 30 is Bell Let's Talk Day
The Hoerskool Driehoek is 45 years old and has a population of 1,060 learners.
"We can not have a situation where our schools become danger zones", said Dlamini.
Netcare911, an emergency services provider, said at least four people may have died and at least five were critically injured.More news: Europeans open new trade channel to Iran
The national Department of Education extended condolences to the families of the students killed.