The Singaporean man is accused of murdering a 30-year-old Vietnamese woman by stabbing her in the chest with a knife.
This allegedly occurred in a common corridor of Block 323 Yishun Central, outside a unit on the sixth floor at about 7.25am on Wednesday.
The police previously said they were called to the scene at the Housing Board block at about 7.25am on Wednesday.
When they got there, Koh, the woman and another man were lying injured along the corridor of the sixth floor.
Koh allegedly injured the couple with a knife after a fight arose from a noise dispute.





