Black Rock police are at Brighton Beach, St Michael, where a young man has gone missing in the water in the area known as the Hot Pot.
Police say that around 4:15 p.m., a group of five young men went to the beach and two of them were in the water swimming when one of them got into difficulties.
He went under the water and efforts were made by his friend to assist him but he was unsuccessful. He disappeared and never resurfaced.
Ambulance personnel were summoned to assist the friend who complained of feeling unwell having taken in a lot of water. He was treated at the scene and discharged by the paramedics.
Members of the Police Marine Unit, the Coast Guard and other sea bathers are conducting a search.