An elderly man was arrested on suspicion of murdering his wife last night after police found her lying in a pool of blood in the living room of their sixth-floor Compassvale Crescent flat.
The 68-year-old was led away in handcuffs at around 7.20pm, almost three hours after police received a call for assistance.
The 63-year-old victim is believed to have suffered injuries to her body, though no murder weapon was identified. Paramedics pronounced her dead at 5pm.
Police have classified the case as murder.
Neither the man nor woman - described as being "very loving" by one neighbour - has been named.
It is understood that one of the woman's daughters had called the police after receiving a call from her father. As he was about to be led to a police car, his two daughters who were with about seven other family members at the first-floor lift landing cried: "Ah Pa, Ah Pa!"
The family declined to speak to the media.
A neighbour who wanted to be known only as Mrs Koh said the couple were friendly and would often wave and greet neighbours.
"The couple were very loving, we always saw them going for breakfast together," said Mrs Koh, 60, who also lives on the sixth floor.
"I woke up in the afternoon and saw a lot of police outside... I didn't expect something like this to happen," she said.
Engineer Ramesh Somu, 46, who lives on the fifth floor, was at home watching movies with his wife and son yesterday afternoon but did not hear any commotion.
"The police came just now and asked us if we heard any screaming or noise," he said. "I'm shocked. This is a very quiet and peaceful neighbourhood, people normally keep to themselves."
A police cordon was in place outside the sixth-floor unit at Block 296C last night, while around 20 officers could be seen at times outside the five-room flat.
Neighbours say a couple in their 60s, who have two daughters, lived in the unit. One neighbour on the fourth floor, a bank officer who wanted to be known only as Ms Bao, said she heard a woman crying after police arrived. "The police came and she was talking to them," said the 36-year-old.
Police investigations are ongoing.