On 20 August 1978, five social escorts – 24-year-old Singaporean Diana Ng Kum Yim[a] and four Malaysians – 22-year-old Yeng Yoke Fun, 22-year-old Yap Me Leng, 19-year-old Seetoh Tai Thim, and 19-year-old Margaret Ong Guat Choo, disappeared.
[1][2][3][4] Diana Ng Kum Yim, Yeng Yoke Fun, Yap Me Leng, Seetoh Tai Thim and Margaret Ong Guat Choo were five of ten women who worked as social escorts in an agency based in a flat in Clemenceau Avenue.
[4] On 19 August, the day before the women disappeared, Wong said they were throwing a party for a wealthy friend who had arrived in Singapore, and invited the five girls.
This theory was supported by the testimonies of Choi Eun-hee, a South Korean actress who was kidnapped to North Korea, who heard that there was a Malaysian couple living somewhere in Pyongyang, and Charles Robert Jenkins, a United States Army deserter who entered North Korea in 1965, claimed that he had seen one of the five women, Yeng, in an amusement park in Pyongyang in 1980 or 1981.
[12] In 2017, the assassination of Kim Jong-nam in Malaysia by suspected North Korean agents resulted in renewed interest in the case of the missing social escorts.