A 35-year-old man has been arrested after the bodies of two people were found in a flat in north Belfast.
A local councillor has said he understands the two people were stabbed.
Police said they were called to Kinnaird Close at about 12:55 GMT on Monday.
They said a member of the public told them that two bodies had been discovered. Police said an investigation was now under way.
“Post-mortem examinations will take place in due course.
“At this stage, it would not be appropriate to elaborate further on the circumstances as our enquiries are at an extremely early stage,” a police spokesperson said.
There are reports that the bodies are those of a man and woman.
There has been a heavy police presence outside the flats as the police investigation continues.
Some residents were asked to leave their homes and were being given shelter at a local community centre.
SDLP councillor Paul McCusker said it was “horrific news”.
“There is a sense of shock across the community, a lot of anger, a lot of sadness,” he said.
“Lots of children and lots of families live in this area. It is fairly settled.”
Sinn Fein councillor JJ Magee said it was a “tragic scene”.
“Absolutely shocked, the community is shocked by the news that has come from this very, very serious situation,” he said.
“It is an absolute tragic event.”
Mr Magee said there would have been many children in the area around the time of the incident due to the Christmas holidays.