Updated: Tue Oct. 24 2006 8:26:44 AM

CTV.ca News Staff

The three front-running candidates vying to be Toronto's mayor were supposed to square-off in a debate Monday night but another candidate crashed the event, demanding to be heard.

The topics up for discussion at the University of Toronto's Hart House were youth crime, affordable housing, public transit and post-secondary education.

But the event was delayed by an hour when another candidate for mayor loudly complained that he was not invited to join the debate.

Kevin Clark took the stage at the Youth Votes 2006 debate. Campus security would not remove Clark but allowed him to continue shouting to the crowd.

Candidates David Miller, Jane Pitfield and Stephen LeDrew would not debate while Clark was there.

Clark accused Miller as mayor of having him jailed and admitted to a mental ward. The candidate reportedly also made sexual comments directed towards Pitfield.

The delay lasted about an hour due to a university policy that says events should be canceled rather than having someone forcibly removed.

Security guards eventually opted to empty the meeting hall, leaving Clark without an audience.

The debate resumed a short time later.

Instead of debating head-to-head, the candidates each answered questions.

Making the biggest promise of the evening, Pitfield once again outlined her plan for TTC expansion.

"I've advocated for building two kilometres of subway a year for 25-years," Pitfield said.

"It's time for a big, bold plan. This is the only thing that will address the huge increase in population that we'll experience in 25-years."

Her main rival in the race, incumbent mayor David Miller, fired back saying cost is the issue.

"The reason subways haven't been built for the last 15-years -- in fact more than that -- is very simple, it's one of funding," Miller said.