Stomper Anonymous saw a couple engaging in obscene acts at the staircase landing of Block 768 Choa Chu Kang Street 54 on Monday afternoon (Sep 17).
Anonymous, who lives in the area, told Stomp that it was at around 12pm when he came across the incident.
Stomper Anonymous said: "I was climbing the stairs to exercise when I saw two people having sex at the staircase landing. It was on the ninth floor if I remember correctly.
"The girl was on top of the guy when I first saw them.
"I am sharing this as I didn't really like what I saw.
"It is my first time encountering something like this.
"I was quite scared actually, as the guy later chased after me and grabbed my arm. He tried to bring me to one corner for 'man talk'.
"I was not injured but he asked me to delete the video whether I filmed it for personal use.
"I managed to flee in the end. I think there was an old lady and a maid who saw him grabbing my arm on the fifth floor.
"I ran down the stairs when he let go of my arm and ran home afterwards.
"Is this illegal and considered public indecency under the Miscellaneous Offenses (Public Order and Nuisance) Act?"
