The parents of a baby boy who died at Bradford Royal Infirmary after allegedly being given a large dose of morphine are threatening legal action.

Seven-day-old Talvin Singh died in the hospital's special care baby unit after being born by caesarian section earlier this month - the sole survivor of twins.

Solicitors engaged by the Singhs said the family was too devastated by baby Talvin's death to comment and described it as "a tragedy".

West Yorkshire Police are now investigating. One nurse has been arrested and suspended and another has been suspended.

A spokesman for Bradford Teaching Hospitals NHS Trust, which runs the hospital, said officials could not comment.

Solicitors said the family had been told by doctors that Talvin would be home with them in Bradford for Christmas.

But their lawyer said today he had died after being given a large dose of morphine and released further details surrounding the death of the boy described as a "miracle baby".

Solicitor Rachelle Mahapatra said: "The death of this baby is nothing short of a tragedy.

"Talvin died following respiratory failure after a nurse at the unit gave the baby a large dose of morphine."

The Leeds-based solicitor said Mrs Singh had been carrying twins and at 20 weeks one of them had been stillborn. "The second twin continued to fight on and was deemed to be a true miracle baby by his parents," she said.

The decision to perform a caesarian was taken at 27 weeks. "After being born the baby was placed in the special care baby unit where his overall health and strength had begun to improve," she said.

"At five days the baby was having his oxygen reduced and was starting to use his own lungs.

"A doctor at the hospital had told Mr and Mrs Singh that their baby should be home in time for Christmas."

She said the parents had not realised until later that their baby had been given a high dose of a drug which had not been prescribed. The results of a post-mortem are pending along with toxicology tests.

A spokesman for Bradford Teaching Hospitals NHS Trust said their sympathies went out to the family but added: "As a police and coroner's investigation are under way the hospital cannot comment further at this stage."

Miss Mahapatra, based at Irwin Mitchell in Leeds, added: "The parents are understandably devastated by what happened.

"The trauma of losing both babies, the second in particular under such tragic circumstances, is difficult for any of us to comprehend."