Lincolnshire Police are treating the deaths of two people, whose bodies were discovered in a Spalding home, as murder.
As reported previously, the bodies were discovered at a house in Dawson Avenue just after 12.15pm on Friday, April 15.
Forensic investigations are continuing at the scene at the time of writing.
Police say they are not yet in a position to be able to name the deceased, as family members are still being made aware.
Two people have been arrested in connection with the enquiry. They are being interviewed on the morning of Saturday, April 16.
DCI Martin Holvey, from EMSOU Major Crime, who is leading the investigation, said: “I would like to hear from anyone in the area of Dawson Avenue from Wednesday [April 13] at 12pm to the same time yesterday and who may have seen or heard anything suspicious or that they think may be relevant to the enquiry.
“Please contact us on the non-emergency number 101 quoting incident 163 of April 15. Information can also be passed anonymously to Crimestoppers on 0800 555 111.”
Superintendent Paul Timmins added: “The events that unfolded in Spalding yesterday have understandably generated a great deal of local concern and upset.
“I would like to make clear that this type of crime is extremely rare and not something we often see.
“Indeed, we believe this is a completely isolated incident.
“There is still a lot of police activity in the area and extra officers in the neighbourhood and I would encourage anyone who has any concerns to please talk to our officers.
“This is very much an active investigation that is in its early stages and police would like people not to speculate as to the circumstances surrounding it.
“We are looking at a number of lines of enquiry and doing our utmost to get to the bottom of what has happened.”