The incident occurred at Siddhivinayak Darshan CHS in Sector-34 yesterday, police said today.
Niang Ngaih Vung, who lived with her Nigerian partner in Sector 2 in Koparkhairane, had gone with him to Kharghar for the birthday party of his Nigerian friend.
Police said she used to work in Ahmedabad at a health spa before shifting to Koparkhairane, about eight months ago.
"She was currently jobless. We have registered an accidental death report. We are inquiring with those present at the flat," a police official said.