A 24-year-old woman has been arrested on suspicion of perverting the course of justice following the death of a two-year-old girl in Dungannon on Friday.
The woman is also accused of causing or permitting the death of a child, and child cruelty.
The woman remains in custody at this time.
A 32-year-old man arrested on suspicion of murder also remains in custody after detectives were granted a court extension earlier today (Sunday) for an additional 36 hours to question him.