Holidaymakers and people visiting a popular beach area, which recently reopened after two years of repair work, are being urged to stay safe.
Repairs to Lowestoft's South Beach were unveiled last month following a £3.5m project which began in 2014.
But now people are being warned not to climb on the rocks, which have been installed to protect the area from erosion.
Ahead of the summer season, coastguards, the RNLI, Lowestoft Volunteer Lifeguard Corps, Waveney District Council and Sentinel Leisure Trust have urged beach-goers to be wary of the 'hidden dangers' associated with climbing on the new structures.
With about 20,000 tonnes of rock positioned on the beach, people have been spotted climbing on them – potentially putting their lives at risk.
HM Coastguard rescue officers from Lowestoft and Southwold have witnessed children playing on the rocks, and a spokesman said: 'We would urge people not to climb up and play on them – they are not a playground, they are there to provide a sea defence.
'There are lots of hidden dangers, and if you see someone in danger call 999 and ask for the coastguard.'
Stephen Ardley, Waveney's cabinet member for operational partnerships, said: 'Warning signs are present on these structures and while we cannot prevent people from climbing on the rocks, we can remind everyone of the importance of beach safety.
'We want people to enjoy our award-winning beaches while being mindful of the risks.'
Vincent Pank, RNLI lifeguard manager, said: 'The lifeguard service will operate on the beach to the south of the Claremont Pier from the end of May until September.
'There will also be a lifeguard presence between the Claremont Pier and the Hotel Hatfield with patrols to the Children's Corner area between July and September.
'However the lifeguards cannot be present all the time and we would ask that people refrain from climbing on the rocks.'
The Lowestoft Volunteer Lifeguard Corps will also be patrolling sections of the South Beach when possible.
? Have you got a Lowestoft story? Email mark.boggis@archant.co.uk
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