Napoli president Aurelio De Laurentiis admits he may walk away from the club due to it's violent fans.

A season-long ban on travelling Napoli supporters has been imposed after 1,500 Ultra' wreaked havoc on a train both to and from Rome for Sunday's 1-1 draw.

There are also reports some home games could be played behind closed doors, as ticket sales for next week's encounter with Fiorentina have already been suspended.

"Such a punishment would be unjust against the club and the honest fans," slammed President and movie mogul De Laurentiis.

"I will not accept blackmail or intimidation from this small criminal element who have nothing whatsoever to do with the Napoli supporters.

"The real fans are another matter. It is right to penalise the thugs, but also necessary to respect the good people and those who invest in football. This is why I could get tired and walk away.

"I expect the authorities to realise the club is not responsible for the behaviour of this minority and it is absurd to close the San Paolo."