Adam GrettonA dead duck investigation took a sinister turn today after it emerged that another four ducks had been killed at the same location in Diss.RSPCA inspectors returned to Skelton Road for a second time in two days after a driver was seen swerving to strike the four birds on Tuesday night .Adam Gretton

A dead duck investigation took a sinister turn today after it emerged that another four ducks had been killed at the same location in Diss.

RSPCA inspectors returned to Skelton Road for a second time in two days after a driver was seen swerving to strike the four birds on Tuesday night .

The news comes after six mallard ducks were found dead on the side of the road on Tuesday morning, which is believed to have been caused by a scooter driver.

Officials from the RSPCA said they were treating the two incidents as suspicious after a local resident witnessed a young man in a dark coloured car swerve into the four birds in Skelton Road at about 10pm on Tuesday. Three were killed and the other was seriously injured and had to be put down by an RSPCA inspector.

The same witness reported a young man driving over six ducks on a scooter whilst they were roosting on the grass verge on Monday night .

Sophie Wilkinson, RSPCA spokeswoman, said: 'It is looking likely that they were killed deliberately, which is extremely worrying and disturbing. All of their injuries are consistent with a traffic accident. They all suffered multiple fractures,' she said.

Anyone with information is asked to contact the RSPCA on 0300 1234 999.