Concerns have been raised after it was confirmed that toxic algae has been discovered at Castlerock Beach on the North Coast.

Blue-green algae can be harmful to humans and is highly toxic to animals.

The public are being urged to remain vigilant and take extra care if visiting the north coast over the holiday period.

Sinn Féin MLA Caoimhe Archibald said: "I would urge people to follow the guidance of the RNLI and stay out of the water.

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"I have written to the Department of Agriculture, Environment and Rural Affairs and the NI Environment Agency about the occurrence of the potentially toxic algae to enquire what they are doing to investigate the causes.

"While agencies have linked recent occurrences of the toxic algae including at Lough Neagh to the hotter than average weather, it is important that the potential link with pollution in our waterways is also investigated.

"I have also enquired if there is a monitoring programme of the water at other local beaches nearby to protect swimmers and pets."