Detectives are hunting the boyfriend of a disabled woman found tied up and stabbed alongside the body of her carer in a Southampton flat.
Police warned people not to approach Mr Tiley
David William Tiley, 47, should not be approached, said Hampshire Police.
Sue Hale, 49, and carer Sarah Merritt, 39, were found bound and stabbed in Ms Hale's Town Hill Park home on Thursday. Post-mortem examinations are under way.
Mr Tiley, from Southampton, was described as white, 5ft 11in (1.8m) with brown hair and tattooed arms.
On his left arm is tattooed the words "Aaron" and "Meg" and on his right a heart with a dolphin jumping over it.
Detective Chief Inspector Richard John, from Hampshire Constabulary, said: "This is a worrying incident and we know people are anxious that the offender is at large.
"We have a team of around 50 skilled detectives working on this inquiry.
"I would urge everyone to remain extra vigilant and take sensible precautions whilst they go about their normal lives.
"I would like to reassure people we are doing all we can to find the person responsible."
Police are viewing CCTV footage taken from a block of flats. It is thought the alarm was raised by the care worker's council employer and her husband, who reported her missing.
The block of 10 flats was evacuated as the investigation got under way, with residents moved into temporary accommodation.