Overflowing sewage caused by a "large blockage" of fat, grease and rags has forced organisers to cancel a Bryan Adams concert in Australia, citing a threat to the arena's toilets.

Western Australia Premier Roger Cook has apologised to music fans after a planned rock concert had to be cancelled at the last minute.

A Bryan Adams concert in Perth was cancelled Sunday due to an enormous fatberg in the city, posing a risk of a backed-up toilets at the RAC Arena. Fatbergs are hard, large masses that can form when non-biodegradable waste,