A CAT and her two kittens died possibly after being coated with thinner or acid.

The SPCA was alerted to the plight of the cats at block 253 Pasir Ris St 21 on Friday night by a member of the public. One of the kittens was reported to have died.

When the SPCA arrived, both kittens have died and 'blood could be seen at the mouth and noses', the SPCA said on Saturday.

'A broken bottle labelled 'thinner' was found nearby but there was no smell evident on the cats although their fur was wet,' the SPCA said.

The adult cat was brought to a veterinarian and eventually put down 'due to her extremely distressed state'.

The bodies of the three cats have been sent to the Agri-Food & Veterinary Authority for a post-mortem.

The SPCA is appealing for witnesses and is offering a $1,000 reward for any information that leads to the arrest and prosecution of the abuser.

Anyone with information should call the SPCA at 62875355, extension 9.

The police are also investigating.