"Kesavan Sivankutty and two of his friends went out partying all night during the third day of Eid. When they came back, they parked their car in a parking lot near Sivankutty's house," said American Mission Hospital chief executive Doctor George Cherian.
"They were all drunk and two of them managed to go home but Sivankutty was too drunk and sleepy, so they left him in the car," he said.
Sivankutty was found lying motionless in the morning on the back seat of the car parked near a hotel and was transferred to a hospital where doctors pronounced him dead.
Sivankutty's body is awaiting repatriation following the conclusion of a police investigation.
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Cherian believes Sivankutty died of natural causes and initial reports cited 'suffocation' as the cause of death - but an official autopsy report has yet to be filed.
Indian Embassy in Bahrain confirmed that authorities were looking into the circumstances surrounding the death.
Sivankutty hailed from Mavelikkara in Kerala and had been working for AMH for the past 10 years. He is survived by his wife and two children.