Cr McGrady said he was appalled and angry to discover the city's cenotaph and rotunda had been vandalised in the lead-up to Anzac Day.

``It's an act of treason because in the last 20 years the number of people who have participated in Anzac Day parades and ceremonies have gone through the roof . .  and yet you still get this group of grubs who go around desecrating what is to many people the altar on Anzac Day.'' 

Cr McGrady said he did not usually talk about vandalism but he could not believe people had no respect for the place where residents were preparing to come together to pay their respects to fallen and injured soldiers.

He said broken glass was strewn on and around the cenotaph and there was graffiti covering the rotunda, a place from which people would observe the ceremony on Anzac Day.

``One would think that a sacred park, such as a cenotaph, even the lowest of lows would leave it alone 365 days a year, but particularly in the lead up to Anzac Day,'' Cr McGrady said.

He issued a warning to the ``grubs'', saying CCTV cameras would be switched on throughout the city soon.

``I'm putting these grubs on notice,'' he said.

If caught, he said he hoped a magistrate would ``throw the book at them''.

Cr McGrady said council staff had cleared the glass and would remove the graffiti from George McCoy Park.

He said police would patrol the area in the lead up to Anzac Day.

Cr McGrady said he could not understand the motivation behind the vandalism.

``The people who are running around doing this, in other countries would have their hands cut off,'' he said.

Anyone found vandalising the war memorial will be prosecuted.