A post-mortem will be carried out on Monday morning on a 56-year-old man who was found dead in Newry on Saturday evening.
The dead man, named as Rimantis Tamosiunas, was discovered at the property on Catherine Street in Newry at around 8pm.
Senior investigating officer, Detective Inspector Jill Duffie, said: “We are keen to trace the movements of the deceased in the hours leading up to his death.
“We would like to hear from anyone who knows him or who may have seen him at any time on Saturday.”
It is understood that police are not clear at the time of writing whether the death was suspicious or not and are awaiting results of the post-mortem for clarification, after which they will issue a further statement.
However, in the meantime they are appealing for information on the incident while information is still fresh in people’s minds.
Newry & Armagh Sinn Fein MLA Mickey Brady urged anyone who might have any information to contact the PSNI immediately.
“The news of this sudden death has caused distress in the local community in Newry,” he said.
“Rather than add further to that distress through speculation, I would appeal to anyone who can help with tracing his movements to contact the PSNI.”
Detectives can be contacted at Newry CID by calling 101 or if they would prefer to provide information anonymously, they can contact the Crimestoppers charity on 0800 555 111.