'It was a contributing factor but the cause of death was drowning,' he said, adding there would be no further investigation of the death.

The news of sudden death of 47-year-old Motwani, whose body was found in the swimming pool of his Palo Alto home June 5 had sent shock waves across the Silicon Valley.

Motwani's friends said, he was learning to swim.

Motwani was the brain behind several of the key advancements in the world of the internet, including Google and PayPal.

(Arun Kumar can be contacted at arun.kumar@ians.in)