She heard a loud thud, but thought a neighbour had dropped something.
"It was so loud - it sounded as though a big heavy cabinet had fallen," the Chin Swee Road resident who wanted to be known only as Ms Chen, 22, told The New Paper in Mandarin last night.
"We looked down but couldn't see anything because the metal laundry racks blocked our view. We thought a neighbour had dropped something."
To her shock, the administrative clerk later found out that the sound came from the bodies of a man and a woman hitting the ground after they fell from height.
Her aunt, who had gone downstairs, told her about the bodies being found at about 8.30pm yesterday at the foot of Block 53 Chin Swee Road.
In 2004, a mother and her two daughters were killed after they fell from the 25th storey of the same block.
The couple's bodies landed at almost the same spot as the earlier victims, said a resident on the 13th storey.
The woman has been identified as a 27-year-old Singaporean, while the identity and age of the man has yet to be confirmed.
A 64-year-old resident of a nearby block, who declined to be named, said that she saw the body of the man, clothed in a white top, lying face up.
Another resident, who gave his name as Roy, 41, said he also saw the bodies.
"The woman was wearing a bra and panties and the man was wearing a top and pants," he said.
Another neighbour who declined to be named also said the woman was dressed only in her bra and panties, but the man was not wearing a top.
A Hotel 81 key card was seen among the belongings of the couple.
Police investigators were later seen on the 26th storey, the highest storey, collecting evidence next to a washing machine. A plastic bottle of water tagged as "1" was seen beside the washing machine before it was removed by the investigators.
When asked about the washing machine left outside his unit, the resident, who wanted to be known only as Mr Zhang, said that it belonged to his landlord and that it was not working.
The restaurant worker, who is in his 30s, said in Mandarin: "We moved it out about 20 days ago and the landlord bought us a new one.
"We were too lazy to take it downstairs so we left it here."
A Singapore Civil Defence Force spokesman said it received a call at 8.29pm requesting for assistance.
"The man suffered fractures to the skull, both hands, chest and hip," said the spokesman.
"The woman also suffered fractures to her skull, right hand, chest and both of her lower legs."
The man was pronounced dead at 8.42pm and the woman at 8.45pm.
The police have classified the deaths as unnatural and are investigating.