Alok Kumar Shukla, 25, from India, had completed his first scuba-dive, which was being run for a group by a local dive-centre, and was already back on the boat.

He had removed his equipment but not his weightbelt when he fell overboard.

According to a report in the Phuket Gazette, three people jumped off the boat to recover Shukla but had difficulty locating him in the choppy water conditions.

When he was eventually brought to the surface, CPR and oxygen were administered and he was taken to a local hospital, but was later declared dead from drowning.

A police investigation was reported to be under way following the incident.

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