Police have increased patrols at an archaeological site near Norwich where vandals have been ripping down signs about dog fouling.
Dunston Field, at the site of the Roman town near Caistor St Edmund, was closed last month to give sheep a safe space to graze and to prevent dog poo problems.
However, unruly walkers have ignored warnings and vandals have repeatedly torn down signs.
Now police are conducting regular patrols after a padlock on a gate to the field was broken and four signs were ripped down on two occasions.
One sign warns of a pack of four or five dogs which charged at another puppy and tells walkers to keep their animals on a leash, while another tells owners to clear up their dog poo.
The site is owned by Norfolk Archaeological Trust, who say they are trying to clamp down on rule-breaking dog owners and make the space "safe for everyone".
Following Wednesday night's patrol officers said they were happy to see everyone using the site responsibly, but urged those who see anything to email Susan.Matthews@norfolk.police.uk or call 101.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here