People are being advised not to swim in the sea at Bettystown, Co Meath, due to the presence of dangerous bacteria in the water.
Meath County Council said samples taken on Monday identified increased levels of e-coli and enterococci.
Bathing water at Bettystown resampled this evening - results due Friday morning. Update will be provided.
— Meath County Council (@meathcoco) June 18, 2014
A notice was put up on the beach, advising people not to swim in the bathing water.
The council said higher levels of bacteria are usually short-term and most swimmers are unlikely to fall ill, but recommended that people avoid swallowing or splashing water, avoid swimming with an open wound, or with any condition that could weaken the immune system.
The water has been re-sampled and results are expected tomorrow.