Police in Co Tyrone are investigating the circumstances surrounding the death of a two-year-old girl.
The PSNI said the child was admitted to hospital on Friday afternoon with what was reported as a serious head injury after the Northern Ireland Ambulance Service attended an address in Park Avenue in Dungannon.
The child later died in hospital.
A post mortem will be conducted to establish the cause of the child's death.
A 32-year-old man has been arrested on suspicion of murder and he remains in police custody this morning.
Detective Chief Inspector John Caldwell said: "Our thoughts are with the child’s family, which is being supported by Family Liaison Officers.
"We will update you in due course but, at this time, there are no further details."
Fermanagh and South Tyrone DUP MLA Arlene Foster tweeted on Saturday morning: "Another tragic death in the constituency - this time a little girl. Thinking of all those dealing with this awful event, and trying to make sense of it all."
Sinn Fein MP Michelle Gildernew said the local community is in shock at the news.
"My thoughts are with all those affected by this tragedy," she added.
"A police murder investigation is underway and that must be allowed to proceed and I would call on anyone with any information which may help those inquiries to contact the PSNI."
Dungannon-based Independent Councillor Barry Monteith added: "Terrible, awful news about the tragic death of the two year old girl in Dungannon last night. Words don't cover the horror of this. A community in shock. Thoughts of us all are with her loved ones."
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