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Seven kittens have been found dead in an discarded shoe box.
They were discovered in Whitecliffe Road, Ebbsfleet Valley, Swanscombe, on Thursday.
It's claimed that a man was seen hours before the kittens were found carrying a similar shoe box and that they were still alive when dumped on the footpath.
They were also thought to be around 12 hours old when found in a red and white Nike shoe box.
Now, the RSPCA is appealing for any information on the incident which happened between 6pm and 8pm.
Spokesman Leanne Plumtree said: "The RSPCA has been called about seven dead kittens found in a box in an alleyway off Whitecliffe Road, Ebbsfleet, Swanscombe.
"We want to hear from anyone with any information that might help us to investigate what happened.
"Please call our inspector appeal line on 0300 123 8018."