2 teen girls in Singapore go missing on 28 & 29 SeptTwo teenage girls have gone missing in separate incidents this week, sparking urgent police appeals and heartbroken pleas from their families. Meanwhile, Teo Mai Lan, 15, was last seen on Monday (29 Sept) at Aljunied, near Nexus International School. “She might be out there in a state of helplessness, and every second counts.”15-year-old goes missing near Aljunied international schoolJust a day after Sofea disappeared, another case emerged. On Monday (29 Sept), 15-year-old Teo Mai Lan was last seen in the vicinity of 1 Aljunied Walk, where Nexus International School is located. Mai Lan was last seen at 1 Aljunied Walk on 29 Sept, around 3.20pm.