A married couple was found dead under mysterious circumstances in Kalyanpur area of Uttar Pradesh capital Lucknow on Saturday.
The bodies of the husband and wife were found inside a room of the rented flat in which they were living.
"We got information that the dead bodies of a husband and wife were found inside a flat. Police reached here and we have recovered a note, which will be looked into. We will also involve forensic experts and take a report from them," Lucknow SSP Kalanidhi Naithani told reporters.
Mr Naithani said an investigation will be conducted.
The incident took place in Kalyanpur's Alok Nagar area.