Authorities in the Maldives are to set up snorkelling safe zones following three deaths so far this year.
In the latest incident, a South Korean woman, 66, got into difficulty near the Paradise Resort and was rushed to hospital in Male, where she later died.
It is thought she died while undoing emergency treatment.
Unconfirmed reports said another elderly tourist, who was staying at the same resort, also passed away while snorkelling.
If the report is confirmed, that would be the fourth death this year.
A honeymooning couple from the Philippines died while snorkelling a week earlier off Kaafu Atoll Dhiffushi island.
Following the recent tragedies, Maldives tourism minister Ali Waheed told local media a series of snorkelling safe zones will be set up.
The minister said the government will work with island councils and resorts to identify safe areas for snorkellers, which can be easily monitored.
