Warner was aged 54 at the time of his death.
The Judicial Investigation Department in Costa Rica said the actor drowned on Sunday afternoon off a beach on the country’s Caribbean coast.
It is understood he was swimming at Playa Grande de Cocles in Limon province when he was pulled underwater by a current.
“He was rescued by people on the beach,” according to the department’s early report, but emergency workers from Costa Rica’s Red Cross found him without any signs of life and he was taken to the morgue.
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