Pet owners in the King's Lynn area are being warned to be vigilant after the death of a number of cats from drinking anti-freeze.
Five have died in the village of Sutton Bridge in the last ten days.
It's believed they may have been deliberately poisoned.
Symptoms to look out for:
- Excessive drinking
- Increased urination
- Seizures or fits
- Panting or heavy breathing
There was a similar incident in nearby Terrington St Clement two years ago.
Vets say cats are particularly attracted to anti-freeze because of its sweet taste and are urging their owners to be cautious.
"Keeping cats indoors is very difficult," Clare O'Dwyer from Terrington Veterinary Centre said.
"If your cat isn't stressed by staying indoors then I think I would certainly do that.
"If your cat seems even slightly unwell, please just ring your local vets and get them there as quickly as possible."