STAFF at Roman sites in Caerleon fear a spate of "mindless" acts of vandalism could start to deter visitors.

Several incidents have occurred over the summer at the ancient sites, and staff say the problem is not going away.

Eight of their information panels have been vandalised, with repairs estimated to cost between £200 and £500 each.

In August, trees next to the amphitheatre site were set on fire. Staff have expressed further worry over youngsters riding bicycles and ruining grass over the barracks and amphitheatre, defacing the panels, and leaving huge amounts of litter.

Jayne Rowlands, Cadw's head of presentation, said: "From our point of view, it's soul destroying. The excavation took place at the turn of the century and a lot of hard work has gone into preserving and presenting the ruins."

She said visitor numbers could be affected if the situation did not improve. "These ruins are well known for being some of the best presented in the UK, and if word gets around that we've got no respect for them it will have an impact on the tourism in the area. Locals quite rightly have a good deal of pride in the site, and this is a real dent to their community spirit."

Phil Mortimore, one of the custodians of the site, agreed the site could suffer problems.

He said: "It's a very important international site, and we are very disappointed that mindless acts of vandalism affect it. Visitors come from all over the world to see the ruins - not least large numbers of school children. We don't want to spoil their enjoyment."

The incidents have been reported to Gwent Police, and a spokeswoman said: "We have received reports of arson and anti-social behaviour, and are investigating.

"We are appealing for anyone in the area with information to phone Gwent Police on 01633 838111, or Crimestop-pers on 0800 555111."