The so-called Croydon Cat Killer is alleged to have claimed two more victims in a three-day time frame.
The deaths were reported by animal welfare group South Norwood Animal Rescue and Liberty (SNARL) who have played a key part in tracking down the culprit.
A statement posted on its Facebook page read: “We are sad and angry to announce the deaths of two cats who appear to have been murdered by the same person whose actions are being investigated by SNARL, the police and RSPCA.
“The first cat was found in Guildford on Monday and the second this morning in Orpington.
“No further details will be released until the process of owner identification and notification is complete.
“May they rest in peace”
They further commented that: “Post mortem reports indicate one killer.”
As well as cats the charity believes a number of other animals such as foxes, rabbits and pigeons have been murdered in the same way and left decapitated.
PETA is offering a £5,000 reward for any ‘information leading to the arrest and conviction of the person responsible for killing and dismembering cats’.
Anyone with information about any of the incidents call police on 101 or in confidence via CrimeStoppers on 0800 555 111. To report incidents to SNARL call 07961 030064 or 07957 830490