The accident occurs in the Nobboi Degree area on Udaypur Road
Police recovered the body of 30-year-old Jyotsna Akhtar from the family's residence in Chittagong, Additional Superintendent of Police Mahbubur Rahman said.
She is the wife of expatriate Jahir Uddin.
Jahir's cousins Amjad Hussain, 25, and 'Musharaf ', 20, have been detained in this connection.