The NRL has fined St George Illawarra $10,000 after coach Nathan Brown accused referees of bias against the joint venture on Sunday.
NRL boss David Gallop says the league accepts Brown didn't intend to make a planned attack on referees but it is improper to resort to accusations of bias.
Brown was upset over referee Steve Clark's 9-3 penalty count in favour of Manly during the Dragons' 36-10 victory at Brookvale Oval on Sunday. The coach had suggested there was a perception the Dragons are ill-disciplined and his players had been unfairly targeted by referees.
The Dragons have five working days to respond to the breach notice.