An investigation is under way after a swan was dismembered on the River Dee in Aberdeen.
The Scottish SPCA is appealing for information following the discovery by a member of the public on Sunday evening.
The incident comes less than a week after the animal charity said it was investigating two dog attacks on swans in the Bridge of Dee area of the city.
However, the SSPCA said the latest attack was carried out by a person.
Ch Insp John Carle said: "This swan was found in the same area that the other two swans were injured although we don't know if the incidents are linked.
"We believe that a person has dismembered the swan and the injuries are not the result of a dog attack.
"A post-mortem will be carried out to establish the exact cause of death.
"This is a very serious and cruel act and we are keen to find the person responsible."
It is an offence to injure or kill a wild swan under the Wildlife and Countryside Act 1981.