Police have been granted a further 24 hours to question a man over the murder of a toddler in Northern Ireland.

Millie Martin, 15 months, died after an attack at a house in Glebe Park in Enniskillen, Co Fermanagh, and is understood to have suffered horrific injuries.

As detectives were given more time to question the 30-year-old man about the killing, Millie's family said they were "numb with pain" at the loss.

"We are deeply heartbroken by the death of our beautiful little Millie," a statement said.

"The entire close-knit family are numb with pain - we simply can't believe that our loving, darling little angel is gone."

They appealed for privacy to cope with their grief and said no words could describe the distress they were going through.

"Millie was our beautiful and precious little girl and we feel blessed to have been able to share that short life," the statement said. "She lit up our lives and brought us endless joy. We will never, ever forget you Millie, but know that you are in the safe arms of Jesus."

Police have refused to disclose the results of post-mortem tests on the little girl's body. A spokeswoman said the details were being withheld for operational reasons.

The house at Glebe Park, off the Old Tempo Road in the Chanterhill area of Enniskillen, was sealed off for forensic examination.

The child was first admitted to the Erne Hospital in Enniskillen on Thursday night before being transferred to Belfast. She died in intensive care at the Royal Victoria Hospital.