Students and their parents were stuck for hours at the Canterbury Park Racecourse grounds, waiting for their scheduled test.

Public order and riot squad police were called in to help control the chaos, with hundreds of students blocking the entrance to the venue.

The waiting crowd became restless, with some parents calling police to help control the chaos.

The riot squad soon arrived on site.

“There was no one managing the crowd, and without proper crowd control, results will be unattainable, so I called the police,” a parent, wishing to stay anonymous, informed 9news.

By around 1.30pm, which was 90 minutes post the scheduled time for the second exam, the children who were waiting to take it were informed of its cancellation.

“Just tell me one thing, how hard is it to organise this when we can organise the Olympics, Commonwealth games?” one furious parent said.

“We’ve got the Olympics coming up, how are we going to organise that when we can’t even organise one like this.”

The education minister’s office told 9News they concede the issues should not have happened and will be conducting a review into what went wrong.

“My sincere apologies to the families and students who turned up today for what is an important day in their lives,” Education Minister Prue Car said.

“Taking an exam is stressful enough as it is and this isn’t good enough.

“I have asked the Department of Education for an urgent review and it is working quickly to address the situation.”

Further tests that were planned for this weekend at Randwick, Homebush and Canterbury have been postponed, with the Department of Education apologising for the inconvenience.

“I apologise for the inconvenience and stress caused to students, parents, and carers as a result of these major disruptions,” NSW Department of Education Secretary Murat Dizdar said.

“What occurred was unacceptable and fell well short of the department’s expectations.

“I understand the frustration of families who had made arrangements to attend the tests.

“Due to concerns regarding crowd control at the large three test centres at Randwick, Homebush and Canterbury, further scheduled tests to be held at these sites tomorrow and Sunday have been postponed.

“Testing will go ahead as planned at the other 104 testing sites across the state.

“I want parents and carers to know that we are committed to rectifying this situation.

“The department will be in direct contact with a range of options for make-up tests.”