Bodies of a man and woman are said to have been found in their flat by the Gorleston police on-Sea, Norfolk, at about 19:30 BST on Tuesday.
The two whose bodies were found on the first floor of a flat were removed and sent to the morgue after an emergency service was called by people in the neighbourhood.
According to reports, the two were found dead upon breaking into the house where they both were lying.
Norfolk Police said the cause of their death cannot be explained now, however, further investigations would be done to come out with the real cause of their death.
A police presence remains at the property as the investigation continues and flowers have been laid outside.