Floral tributes have been left outside a flat where a man and woman were found dead.
Norfolk Police said officers forced entry to the address in Oxford Avenue, Gorleston, on Tuesday.
The force said it had received a report of concern for the safety of a person at the property shortly after 7.30pm.
The man and woman were pronounced dead at the scene.
Neighbours described the woman as a “bubbly, funny, friendly person”.
A marked police car remained outside the property on Wednesday, with floral tributes left on the path.
Police in forensic suits arrived later in the day, followed by three fire engines and the fire service’s environmental protection unit.
A spokesman for the East of England Ambulance Service said a call was received shortly before 8.30pm on Tuesday, adding: “We sent a range of resources, including ambulance officers and crews from our hazardous area response team.
“Sadly, two people were pronounced dead at the scene.”
A second neighbour said the woman was “bubbly, friendly, she would always say hello”.
Another said: “She was at a Slimming World group I went to and did really well. She did fantastically well, brilliantly well.
“I’m absolutely devastated.”
