According to Fiza's postmortem report and police investigations, "it seems she has committed suicide", Mohali SSP Gurpreet Singh Bhullar told reporters in Mohali.
The three-member medical board, which handed over the report to the special investigation team of the Mohali police on Monday, had opined that Fiza had died due to poisoning by aluminium phosphide in the presence of ethyl alcohol.
The postmortem report, prepared by doctors P S Bhatti, Neera Verma and Sukhwinder Kaur, had said, "The cause of death in our opinion is poisoning due to aluminium phosphide in the presence of ethyl alcohol."
The SSP said Fiza's advocate-friend Ranjeet Hooda had also told the SIT that she was under depression. "Though the medical report is not the last evidence, we rule out any foul play in her death as of now," he said.
The highly decomposed body of 39-year-old Fiza was found at her Mohali residence on August 6.
Fiza had shot into limelight four years ago following her controversial marriage to Chander Mohan, son of former Haryana CM Bhajan Lal.