Dead piglets were dumped in the centre of a Norfolk town in what is believed to have been a protest by animal rights activists.

The four animals were left near the town hall in Downham Market on Sunday, while graffiti was sprayed on the pavement around the bodies including the word victims.

A Norfolk police spokesman said: "Officers are investigating following an incident of criminal damage in Downham Market on Sunday, March 31.

Eastern Daily Press: One of the piglets dumped in Downham MarketOne of the piglets dumped in Downham Market (Image: Supplied)

"Unknown suspects spray painted graffiti and left four dead piglets in the town square. Enquiries are ongoing."

It is not clear how old the piglets were, how they died or where they were obtained from, with no group so far claiming responsibility.

The bodies have now been removed and disposed of.

Downham Market Town Council said it did not wish to comment on the incident.