The man, who was 57, fell ill at the Algar de Benagil caves site resort on the Algarve on Monday. Authorities said the incident happened just before 3pm local time after the man had gone swimming.

As Grutas de Benagil, no concelho de Lagoa, no Algarve, têm a partir de esta terça-feira novas regras de acesso, que incluem a proibição de desembarque e de acesso a nado ao seu interior.