Officers were called to an address in Huddersfield on Monday.
Two people have been found dead in a house in West Yorkshire.
Officers were called to an address in Harpe Inge, Dalton, Huddersfield, just before 10am on Monday after paramedics attended the property and found a man and a woman who had suffered multiple injuries, West Yorkshire Police said.
The pair were confirmed to have died at the scene and police have launched a double murder inquiry.
Detective Superintendent Marc Bowes, of the Homicide and Major Enquiry Team, said: “This has clearly been an exceptionally serious offence and I can promise residents that a full investigation is ongoing into the murder of this man and woman.
“We are conducting extensive inquiries at the scene and at other locations in the Dalton area as we investigate the circumstances of what took place.
“I am appealing for anyone who saw suspicious activity overnight or this morning at the property on Harpe Inge to contact us.
“Residents in the nearby area will also note an increased police presence on their streets and I want to reassure them and the wider community we are doing all we can to bring persons responsible for this offence to justice.”
Anyone with information is asked to contact the Homicide and Major Enquiry Team on 101 referencing police log 408 of May 15, or to contact Crimestoppers on 0800 555111.
