Detectives investigating the drowning of one of HMS Belfast's resident cats in February have issued a CCTV image of three people they would like to trace.
Southwark police have released the image of the three teenagers, two girls and one boy, taken from a street CCTV camera at the time of the incident.
"The actions of the people responsible for this are truly despicable, and they need to be caught as soon as possible," said a police spokesman.
"Kilo was beginning to feel at home of the ship after the crew had taken him in from Battersea Dogs and Cats Home and was a great companion to those who serve on the ship.
"Anyone with information is asked to call Crimestoppers on 0800 555 111 quoting the reference numbers on the image."
SE1-based animal rights campaign group PETA has put up a reward of up to £1,000 for information leading to the arrest and conviction of whoever is responsible.