42-year-old Chinese national Wang Zhijian was charged with the murder of Ms Zhang Meng, 42, yesterday.

Police are still investigating the deaths of the other two women and the girl's stabbing. Combing the flats floor by floor for clues after receiving a call about a woman lying motionless and face down at the foot of Block 349 in Yishun Avenue 11 on Friday, at about 12.50am, they found a bloodstained padlock on the sixth floor. Wang was in the house but refused to open the door.

Barging into the unlit flat at about 2am, officers found a 14-year-old Northland Secondary School student seriously injured but alive. Two other occupants, a 17-year-old and Ms Zhang, were dead. They were believed to be mother-daughter pairs, The 14-year-old is said to be the daughter of the 36-year-old woman who was found at the foot of the block, while the 17-year-old was Ms Zhang's daughter.

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