Upper Thomson resident X N had just returned home on Saturday (Feb 21) night when she noticed the doorknob of her ground floor room slowly rotating.Puzzled, she thought it was the domestic helper and called out to alert them of her presence.«As the doorknob was turning, I saw a masked man looking back at me,» she recounted to AsiaOne.The resident, who wanted to be known only by her initials, said the intruder «disappeared into darkness» after she asked who the person was and screamed for help.«The whole house was pitch black except for my room, so the person actually knew that I was inside the room and still decided to open my door while I asked if it was the helper,» she said.She immediately called the police and waited outside with the two other people at home at that time.The police told AsiaOne on Sunday (Feb 22) that it received a call for assistance at a residential estate along Marigold Drive at about 9.40pm on Saturday. Read more