A murder inquiry has been launched after a man and a woman were found with fatal injuries at a house in a Somerset village.
Two men aged 34 and 67 have been arrested on suspicion of murder and are in custody for questioning.
At the time of the incident two children were in the house on Dragon Rise, Norton Fitzwarren, near Taunton.
Avon and Somerset police have voluntarily referred themselves to the Independent Office for Police Conduct (IOPC) because officers had previously been in contact with some of those involved.
The force said it believed it had been an “isolated incident” but increased patrols were taking place to reassure the public.
Police were called to the development at about 9.45pm on Sunday where a man and a woman, both in their 30s, were found inside with serious injuries. Despite the efforts of officers and medics, they were pronounced dead at the scene.
A cordon remains in place at two properties on the street while police carry out a forensic examination. The formal identification process and postmortem examinations to determine the causes of death will take place.
A police spokesperson said: “Due to prior police contact with those involved, a voluntary referral will be made to the Independent Office for Police Conduct. It would be inappropriate to go into further detail until the referral has been considered.”
Det Insp Neil Meade, of the force’s major crime investigation team, said: “The thoughts of everyone in the force this morning are with the families of the two people who sadly died last night.
“Two young children were inside the property at the time of the incident and while thankfully they weren’t hurt, they are understandably distressed at what has happened. They are being looked after and specially trained officers have been deployed to support the victim’s families in what is undoubtedly the most difficult of times.”
He added: “We will carry out a full and thorough investigation and we will do all we can to achieve justice for the victim’s families. While this appears to be an isolated incident, there will be increased police activity in the area to provide the community with reassurance.
“Incidents like this are very rare but when they do happen, we know they cause significant concern so we’d urge anyone with worries or questions to speak to an officer or contact their local neighbourhood policing team.”