A TWO-YEAR-OLD boy died after falling in mysterious circumstances from a Sha Tin building yesterday. Wong Ming-hung's body was found by a staff member of the Greenwood Kindergarten outside the 27-storey building in Greenwood Garden just before 9 am. The boy had been taken to the kindergarten at around 8.30 am by his pregnant mother, So Shuet-mui, 39, who then went for a maternity check-up. Police located the boy's father, 38-year-old Wong Yiu-ming, who was working in nearby Fo Tan, and he identified the body at the Prince of Wales Hospital. Equipped with a range-finder and binoculars, officers from the forensic evidence unit took measurements from the roof to try to establish which floor the boy had fallen from. A tracker dog was used to search the area and the upper floors were checked to try to find the boy's T-shirt. He was wearing only shorts when he was found. A school bag was discovered in a nearby rubbish bin although it has not yet been established whether it belonged to the dead boy. Police said it was unlikely the boy had been able to climb over the 1.2-metre wall surrounding the roof and they have not eliminated the possibility he was taken to an upper floor or the roof, where he was either pushed or thrown from the building. A woman who took her five-year-old son home from the kindergarten after the incident said there were more than 10 teachers looking after the children in the morning. ''Security there is quite good and entry by strangers is restricted,'' she said. A spokesman for the Education Department offered condolences to the parents. ''We are vigorously investigating the circumstances of the case. It would not be appropriate to make any comments at this stage,'' he said. An autopsy is to be carried out today.