The deaths of a man and a woman in a house in Belfast are being treated as a double murder, it has emerged.
The Police Service of Northern Ireland (PSNI) said the incident in the Ravenhill area in the south east of the city is thought to be domestic-related.
Police believe the suspect may have been in a relationship with one of the victims.
They said the person they are looking for does not pose a threat to the wider public.
Police said they did not want the identities of the middle-aged victims to become public at this stage as not all of their next of kin had been informed of what had happened.
Officers found their bodies in the living room of the flat in the Ravenhill Court area yesterday afternoon.
They had been alerted by a member of the public who noticed the front door of the property had been badly damaged.
Detective Chief Inspector Una Jennings, senior investigating officer with the PSNI, said: "We are treating this at the moment as a suspected domestic homicide."
She appealed to whoever was responsible to come forward.
The detective added: "I would describe it as a domestic incident, we believe that the perpetrator of this crime may well have been in a relationship with one or other of the victims."
She said the exact causes of death would not be confirmed until post mortem examinations were carried out in the coming days.
Asked if the perpetrator posed a danger to the wider public, Ms Jennings said: "We don't consider they pose a risk to the public at this time."
Detectives have appealed for anyone who noticed anything suspicious in the Ravenhill Court area between 3pm on Wednesday and 3pm yesterday to contact them.