A murder investigation has begun after the death of a 23-month-old girl in County Tyrone, police have said.
Tavia Da Costa, who was due to turn two later this month, died at a house in Windmill Court in Dungannon on Sunday.
Police had been treating the death as suspicious, but following the results of a post-mortem examination, it was now being treated as murder.
A man and two women, all aged in their 20s, have been arrested and are in custody.
