The laboratory sciences student is believed to have drowned her child in a bucket of water soon after giving birth.
Cleaners made the gruesome discovery at about 10.40am on Tuesday while washing the toilet of the surau.
A post-mortem confirmed that the baby died of drowning, said state police chief Datuk Jalaluddin Abdul Rahman.
“Traces of milk were also found in the baby, probably from being breastfed.
“This proved that the baby died after being born,'' he said.
The student was picked up from her home at about 11.30pm on Wednesday night - The Star