Decommissioned sea containers used as a wind-break at a Fremantle music festival on Sunday have fallen into the sea at Port Beach.
The sea containers were erected by Horizons Touring to act as a wind and noise break at the 'Why Make Sense festival' held over the last two weekends at the popular beach.
A City of Fremantle spokesman confirmed the sea containers had fallen into the ocean overnight.
"They didn't wash up at all," he said.
"They created a sea wall between the ocean and the event and they were designed that if they fell, they would fall backwards into the ocean.
"They've just fallen over. They never went out to sea, they don't move, they've just rolled over on the beach and it's Horizons Touring's responsibility."
Horizons Touring's managing director Saran Bajaj said the use of the sea containers was approved and that bad weather was ultimately to blame.
"The sea containers were approved for the purpose and set-up carefully and compliantly, in conjunction with City of Fremantle, strict health and safety standards and risk management plans," he said.
"Bad weather from the last twelve hours or so was much worse than anticipated and a large amount of beach sand was displaced, which caused the position of the containers to shift.