The 54-year-old actress, known simply as Sridevi, drowned in her hotel apartment’s bathtub following loss of consciousness, it says.
It had earlier been reported that she died of cardiac arrest on Saturday while at a family wedding in Dubai.
Bollywood stars, sporting giants, and leading politicians have reacted with shock to her death.
The media arm of the Dubai government said the post-mortem analysis had been completed and the cause of death ascertained.
The case has been passed to the Dubai Public Prosecution for what officials said were “regular legal procedures”.
The post-mortem report has been released by Dubai police to Sridevi’s family and the Indian consulate, the Gulf News says.
The paper said the report could mean a delay to the repatriation of the body. It had been expected to be flown home on Monday.