Parts of an open razor blade have been found on Hawthorn’s training ground ahead of tomorrow’s AFL grand final in Melbourne.

In a major security scare, forty staff had to scour the pitch to ensure the Waverley grounds were clear an hour before the side’s open training session yesterday.

Two parts of a razor blade were recovered before support staff allowed the session to go ahead, reported.

Hawthorn was prepared to axe training if a large number of blades were found. (Getty)

Thousands of fans turned out to watch the side, with some joining the Hawks on the field.

The Hawks reportedly believe it was a deliberate act and could have caused serious injury to their players.

Open razor blades were reportedly found just an hour before the Hawks were due to start training at Waverley. (Getty)

It is understood the club had not ruled out cancelling training if a large number of blades were found.

Hawthorn chief executive Stuart Fox told News Corp they had ensured no players were in danger but were deeply concerned.

Hawthorn Chief Executive Stuart Fox said he was "deeply concerned". (Getty)

“We are fortunate that no one was hurt and disappointed that someone would go to that extreme and put our players in jeopardy," he said.

The club reportedly decided not to involve police.

The revelation comes as Hawthorn and Sydney prepare for the traditional grand final parade, that will snake its way through Melbourne's CBD at noon.