"No trace of narcotics, no trace of any toxic products, no trace of medicines, no trace of alcohol," prosecutor Christian de Rocquigny told Reuters.
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Bourdain skipped dinner the night before his body was discovered, The New York Times reports.
When he did not arrive for breakfast with Eric Ripert, Bourdain’s close friend and chef of Le Bernardin in New York, a hotel receptionist went to his room to check on him and found his body.
Bourdain was cremated in France.
His remains and travel belongings have been sent to his younger brother, Christopher.
Gladys Bourdain, Anthony Bourdain’s mother, told the New York Times that the family will likely hold “a small, private ceremony of some kind.”
Italian actress Asia Argento remembered her boyfriend Anthony Bourdain on Twitter Friday, marking two weeks since his death.
“Two weeks without you,” she tweeted, along with a smiling photo of them together.